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((Short description|Middleware preventing lag))
((Infobox software
| name                   = GGPO
| screenshot             = Ggpo-logo.png
| screenshot size        = 75px
| caption                =
| developer              = Tony "Ponder" Cannon
| latest_release_version = 0.32
| latest_release_date    = August 27, 2015
| discontinued           = yes
| programming language   = [[C (programming language)|C]], [[C++]]
| operating_system       = [[Microsoft Windows]]
| genre                  = [[Middleware]]
| license                = [[MIT License]]<ref name=LicenseFAQ>((cite web| url = https://github.com/pond3r/ggpo/blob/master/LICENSE| title = ggpo/LICENSE at master · pond3r/ggpo | website = [[GitHub]] | access-date             = 2019-10-09))</ref>
| website                = ((official url))
))

'''GGPO''' ('''Good Game Peace Out''') is [[middleware]] designed to help create a near-[[lag (video games)|lagless]] online experience for various emulated arcade games and fighting games. The program was created by Tony Cannon, co-founder of fighting game community site ''Shoryuken'' and the popular [[Evolution Championship Series]].

==History==
Before its creation, GGPO creator Tony Cannon was completely dissatisfied with the 2006 [[Xbox 360]] re-release of ''[[Street Fighter II′ Turbo: Hyper Fighting|Street Fighter II: Hyper Fighting]]'' after experiencing its criticized online capabilities.<ref name=gamasutra/> As a reaction to its service, Cannon began development on GGPO and released the first version in late 2006. Cannon later demonstrated GGPO to Capcom, and it was positively received.<ref>((cite web |url=http://www.capcom-unity.com/s-kill/blog/2008/08/29/ggpo_networking_guru_talks_sf_hd_remix_ |title= GGPO Networking Guru Talks SF HD Remix! |last=Cannon |first=Tony |date=2008-08-29 |access-date=2011-06-21 |publisher=[[Capcom]] |archive-url=https://web.archive.org/web/20200128093613/http://www.capcom-unity.com/s-kill/blog/2008/08/29/ggpo_networking_guru_talks_sf_hd_remix_ |archive-date=2020-01-28))</ref>

The downloadable GGPO client supported many games from [[Capcom]] and [[SNK Playmore|SNK]], including ''[[Super Street Fighter II Turbo]]'', ''[[The King of Fighters 2002]]'', and [[Metal Slug 2|Metal Slug X]] through the use of a built-in [[Video game console emulator|emulator]]. Video game companies have also implemented a licensed version of GGPO. Games using it include ''[[Skullgirls]]'' and ''[[Street Fighter III: 3rd Strike|Street Fighter III: 3rd Strike Online Edition]]''.<ref name=gamasutra>((cite web|access-date=2011-04-23|date=2011-04-22|url=http://gamasutra.com/view/news/34050/Interview_How_A_Fighting_Game_Fan_Solved_Internet_Latency_Issues.php|title=Interview: How A Fighting Game Fan Solved Internet Latency Issues|first=Kyle|last=Orland|publisher=[[Gamasutra]]|archive-date=2011-04-25|archive-url=https://web.archive.org/web/20110425150653/http://www.gamasutra.com/view/news/34050/Interview_How_A_Fighting_Game_Fan_Solved_Internet_Latency_Issues.php|url-status=dead))</ref><ref>((cite web | url= http://shoryuken.com/2011/06/06/street-fighter-iii-3rd-strike-online-1st-trailer-and-screens/ | title= Street Fighter III: 3rd Strike Online – 1st Trailer and Screens | first= Adam | last= Heart | date= 6 June 2011 | work= Shoryuken | access-date= 6 June 2011 | quote= Street Fighter III Third Strike Online Edition will be using GGPO netcode&nbsp;... | archive-date= 8 June 2011 | archive-url= https://web.archive.org/web/20110608025320/http://shoryuken.com/2011/06/06/street-fighter-iii-3rd-strike-online-1st-trailer-and-screens/ | url-status= dead ))</ref>

On October 9, 2019 Cannon announced on his Twitter account that GGPO was now [[Open source software|open source]] and available under the [[MIT License]].<ref name=twitterOSS>((cite tweet |last=Cannon |first=Tony |user=Pond3r |number=1181800172184977408 |date=2019-10-09 |title=GGPO has a new home and is now available under the MIT License.  Get it here!: https://t.co/7KXHGQ7OMN ))</ref>

==Design==
((see also|Netcode#Input delay and rollback networking))
GGPO uses a [[netcode]] technique called "[[rollback netcode|rollback]]". Rather than waiting for input to be received from other players before simulating the next frame, GGPO predicts the inputs they will send and simulates the next frame without delay using that assumption. When other players’ inputs arrive, if any input didn't match the prediction, GGPO rolls back the state of the game to the last correct state, then replays all players’ revised inputs back until the current frame. The hope is that the predictions will be correct most of the time, allowing smooth play with minimal sudden changes to the game state.<ref name="gamasutra-lag">((cite web|last1=Miller|first1=Patrick|title=The lag-fighting techniques behind GGPO's netcode|url= https://www.gamedeveloper.com/programming/the-lag-fighting-techniques-behind-ggpo-s-netcode|website=Gamasutra|date=12 September 2012 |access-date=19 August 2016))</ref><ref name="gdmag-lag">((cite magazine |last=Cannon |first=Tony |date=September 2012 |title=Fight the Lag! |url=http://gdmag.com/issue/2012/September |magazine=Game Developer Magazine |access-date=12 September 2012 |archive-date=20 September 2012 |archive-url=https://web.archive.org/web/20120920061329/http://gdmag.com/issue/2012/September |url-status=dead ))</ref> The system in itself is highly similar to [[client-side prediction]], but applied to a peer-to-peer setup.

The client program can allow players to manually adjust native input delay in high-ping situations, either creating a possibly-jerky yet accurate representation or a smoother game with input delay.

==GGPO client==
GGPO was originally bundled with a client which enabled users to play supported games online with other players. A matchmaking system allowed players to request challenges from other users, while non-participants could spectate the match and chat. Once a challenge initiated, the match ran a ROM through its prepackaged emulator, FinalBurn Alpha. This client was discontinued, and superseded by other clients which make use of GGPO's networking middleware, such as [[Fightcade]] or RedGGPO.

==Games using GGPO==
((collist|colwidth=30em|
* ''[[Final Fight: Double Impact]]''<ref>((cite web |url=http://www.finalfightgame.com/ |title=Capcom: Final Fight |author=<!--Not stated--> |access-date=2019-10-04 |quote=GGPO network technology creates a frame-accurate arcade experience across the internet, and with online voice chat and the ability to join games in progress, it's just like playing in the arcade.))</ref> (2010)
* ''Dragon Ball: Zenkai Battle''<ref>((cite web |url=https://game.watch.impress.co.jp/docs/news/409373.html |title=バンダイナムコ、AC「ドラゴンボール ZENKAIバトルロイヤル」 |author=佐伯憲司 |date=2010-11-25 |website=GAME Watch |access-date=2019-10-04 |quote=ICカードによるプレイ履歴を参照することにより、プレーヤーレベルに応じたマッ1チングが行なわれるという（ICカード1枚で全キャラクター使用可能）。このあたりのシステムには、海外で評価の高いネットワークライブラリ「GGPO」が使われており、遠隔地同士のマッチングなどで起きがちなネットワーク遅延などにも対応できているという。 |language=ja))</ref> (2011)
* ''[[Street Fighter III: 3rd Strike|Street Fighter III: 3rd Strike Online Edition]]''<ref>((cite web |url=http://www.capcom.co.jp/sf3_3rd/online.html |title=新機能 |author=<!--Not stated--> |website=CAPCOM：STREET FIGHTER III 3rd STRIKE ONLINE EDITION -Fight for the Future- |access-date=2019-10-04 |quote= 最高のオンラインゲームプレイを提供するGGPOシステムを使用。 |language=ja))</ref> (2011)
* ''[[Skullgirls]]''<ref>((cite web |url=http://skullgirls.com/2011/09/skullgirls-ggpo-and-you/ |title=Skullgirls, GGPO… and You |last=Zaimont |first=Mike |date=2011-09-13 |website=Skullgirls 2nd Encore |access-date=2019-10-04 ))</ref> (2012)
* ''[[Marvel vs. Capcom Origins]]''<ref>((cite web |url=https://www.siliconera.com/2012/07/18/marvel-vs-capcom-origins-to-use-ggpo-for-online-play/ |title=Marvel vs. Capcom Origins To Use GGPO For Online Play |last=Sahdev |first=Ishaan |date=2012-07-08 |website=Siliconera |publisher=[[Curse LLC]] |access-date=2019-10-04 ))</ref> (2012)
* ''[[Darkstalkers Resurrection]]''<ref>((cite web |url=http://www.capcom-unity.com/dubindoh/blog/2013/01/11/darkstalkers-resurrection-and-ggpo |title=Darkstalkers Resurrection and GGPO |last=Araujo |first=Yuji |date=2013-01-11 |website=Capcom Unity |access-date=2019-10-04 ))</ref> (2013)
* ''[[Dungeons & Dragons: Chronicles of Mystara]]''<ref>((cite web |url=https://kotaku.com/capcoms-two-classic-arcade-titles-reborn-on-modern-co-514249046 |title=Capcom's Two Classic Arcade Titles, Reborn on Modern Consoles |last=Neltz |first=András |date=2013-06-13 |website=[[Kotaku]] |publisher=[[Gizmodo Media Group]] |access-date=2019-10-04 |quote=Chronicles of Mystara is powered by GGPO to offer seamless drop-in/drop-out online gameplay for up to four players in each of the title’s two modes.))</ref> (2013)
* ''[[Divekick]]''<ref>((cite web |url=http://www.divekick.com/ |title=Divekick - Two-button fighting game for PS3, PS Vita and Steam |author=<!--Not stated--> |access-date=2019-10-04 |quote=Ranked and non-ranked GGPO-powered online play, the most trusted netcode in fighting games.))</ref> (2013)
* ''[[Metal Slug 3]]''<ref>((cite tweet |user=dotemu |number=428125292008177664 |date=Jan 28, 2014 |title=Yes, it is a licensed version of GGPO))</ref> (2014)
* ''[[Lethal League]]''<ref>((cite web |url=http://lethalleague.reptile-games.com/ |title=Lethal League |author=<!--Not stated--> |access-date=2019-10-04 |quote=High performance online GGPO multiplayer.))</ref> (2014)
* ''[[Rising Thunder (video game)|Rising Thunder]]''<ref>((cite web |url=https://www.redbull.com/us-en/rising-thunder-interview-with-seth-killian |title=Rising Thunder interview with Seth Killian |last=Partridge |first=Jon |date=2015-08-31 |website=Red Bull |access-date=2019-10-04 |quote=It’s a beat’em up built for online play too: it’s built on the backend of GGPO for lag-free play, and it’s also just so happens to be free.))</ref> (2015)
* ''Skullgirls (mobile)''<ref>((cite tweet |user=sgmobile |number=1175212377630920705 |date=Sep 20, 2019 |title=In case you didn't know, we're using "GGPO" as our netcode solution for Skullgirls Mobile, which is the same netcode used for Skullgirls 2nd Encore! ))</ref> (2017)
* ''Pocket Rumble''<ref>((cite web |url=https://pocketrumble.com/ |title=Pocket Rumble |author=<!--Not stated--> |access-date=2019-10-04 |quote=Near-flawless online multiplayer with GGPO netcode))</ref> (2017)
* ''[[Windjammers (video game)|Windjammers]]''<ref>((cite web |url=http://www.dotemu.com/windjammers-arrives-august-29-on-ps4-ps-vita/ |title=Windjammers arrives August 29 on PS4 & PS Vita |author=<!--Not stated--> |website=Dotemu |date=20 July 2017 |access-date=2019-10-22))</ref> (2017)
* ''Punch Planet''<ref>((cite tweet |user=PunchPlanet |number=1110650147258535936 |date=March 26, 2019 |title=Join the online #community featuring #GGPO netcode. ))</ref> (2017)
* ''Omen of Sorrow''<ref>((cite web |url=https://www.unrealengine.com/en-US/developer-interviews/omen-of-sorrow-proves-that-a-small-indie-developer-can-make-a-well-respected-competitive-fighting-game |title=Omen of Sorrow Proves That a Small Indie Developer Can Make a Well-Respected, Competitive Fighting Game |last=Thang |first=Jimmy |date=2018-11-29 |website=Unreal Engine |publisher=Epic Games |access-date=2019-10-04 |quote=UE4’s versatility allowed us to implement the well-regarded GGPO system for online fights which, in turn, set the basis for the development of the entire gameplay.))</ref> (2018)
* ''[[Fantasy Strike]]''<ref>((cite web |url=http://www.fantasystrike.com/ |title=Fantasy Strike |author=<!--Not stated--> |access-date=2019-10-04 |quote=Fantasy Strike uses GGPO’s rollback-style networking.))</ref> (2019)
* ''[[Them's Fightin' Herds]]''<ref>((cite web |url=https://www.mane6.com/news/engine-get-and-three-short-stories/ |title=Engine get and three short stories – Them's Fightin' Herds |author=<!--Not stated--> |date=2013-03-30 |website=Mane6 Blog |access-date=2019-10-04 ))((Dead link|date=February 2022 |bot=InternetArchiveBot |fix-attempted=yes ))</ref> (2020)
* ''FOOTSIES Rollback Edition''<ref>((cite tweet |user=HiFightTH |number=1259147350406135811 |date=2020-05-09 |title=FOOTSIES with GGPO.... I need testers.... If you have FOOTSIES friends, please try it out))</ref><ref>((cite tweet |user=HiFightTH |number=1311294768144502784 |date=September 30, 2020 |title=FOOTSIES Rollback Edition is now available on Steam!))</ref> (2020)
* ''Terrordrome - Reign of the Legends''<ref>((cite web |url=http://www.youtube.com/watch?v=LOSwpCYps7Y&t=8m30s |title=Terrordrome - Reign of the Legends Vlog 01 Full - Game overview |last= Enclave |first=Marc |date= Feb 12, 2020 |website= YouTube |access-date=March 9, 2020 |quote=And last but not least we have GGPO rollback netcode integrated.))</ref> (2020)
* ''[[Guilty Gear|Guilty Gear XX Accent Core Plus R]]((efn|name=Patch))''<ref>((cite tweet |user=ArcSystemWorksU |number=1317011643851710466 |date=2020-10-16 |title=GUILTY GEAR XX ACCENT CORE PLUS R will be receiving it's much awaited GGPO update soon!))</ref> (2020)
* ''[[Melty Blood: Type Lumina]]''<ref>((Cite tweet |user=WistfulHopes |number=1443484339161874442 |title=type lumina uses ggpo as its rollback method))</ref> (2021)

* ''[[The King of Fighters XV]]''<ref>((cite web |url=https://www.snk-corp.co.jp/us/games/kof-xv/obt_us.pdf |author=<!--Not stated--> |title="KoF XV Open Beta Test Information"|access-date=2021-11-17))</ref> (2022)
* ''[[Breakers (1996 video game)|Breakers Collection]]''<ref>((cite press release |author=<!--Staff writer(s); no by-line.--> |title=Breakers Collection - Dev Diary: Online Versus Playtest |url=https://www.gamespress.com/Breakers-Collection---Dev-Diary-Online-Versus-Playtest |location= |publisher=Games Press Ltd |agency= |date=2021-02-09 |access-date=2021-02-09))</ref> (2023)
* ''[[Samurai Shodown (2019)]]''((efn|name=Patch))<ref>((cite web |last1=Moyse |first1=Chris |title=Rollback netcode coming to Samurai Shodown spring 2023 |url=https://www.destructoid.com/samurai-shodown-rollback-netcode-update-online-snk-evo-2022/ |website=Destructoid |date=6 August 2022 |access-date=14 August 2022))</ref>(2023)
* ''[[Under Night In-Birth II|Under Night In-Birth II [Sys:Celes]]]''<ref>((cite web |url=https://www.gematsu.com/2023/08/under-night-in-birth-ii-sysceles-announced-for-ps5-ps4-switch-and-pc |title= In addition, newly enhanced network features (alongside Rollback Netcode) allow players to test their skills against global online opponents in smooth Rank Matches and Player Matches!))</ref> (2024)

* ''Blazing Strike''<ref>((cite tweet |user=markarotGC |number=1326395353202089984 |date=2020-11-11 |title=#BlazingStrike + #GGPO = ?))</ref><ref>((cite press release |author=<!--Not stated--> |title= Aksys Games Announces Blazing Strike |url=https://myemail.constantcontact.com/Fighting-Game-News--Aksys-Games-Announces-Blazing-Strike.html?soid=1101398907811&aid=fFA0hzYig3g |location=Torrance, California |publisher=Aksys Games |agency=Michael Meyers Public Relations |date=2021-05-20 |access-date=2021-05-20))</ref> (TBA)
* ''Coreupt''<ref>((cite tweet |user=JW_Corelated |number=1259267333714964481 |date=2020-05-09 |title=GGPO is the current plan!))</ref> (TBA)
))

==Games using rollback networking==
((Dynamic list))
((collist|colwidth=30em|
* ''[[Super Street Fighter II Turbo HD Remix]]''<ref>((cite web |url=http://www.sirlin.net/sf-hdr/street-fighter-hd-remix-features |title=Street Fighter HD Remix Features |last=Sirlin |first=David |website=Sirlin.Net |access-date=2020-02-06 |quote=Note that the networking uses Tony Cannon's ggpo technique, and he consulted to ensure it was done correctly.))</ref> (2008)
* ''[[Marvel vs. Capcom 2: New Age of Heroes]]''<ref>((cite web |url=https://www.capcom-unity.com/sven/blog/2009/04/27/wheres_yo_curleh_mustache_yes_mvc2_is_real | title=Where's Yo Curleh Mustache? Yes, MVC2 is Real! |last=Svensson |first=Christian |website=capcom-unity.com|access-date=2020-02-20 |quote=With the game being developed by Backbone, we are using largely the same, critically acclaimed net code that we used in Super Street Fighter 2 Turbo HD Remix and with that will come our player match quarter mode/lobby system that has proven so popular.))</ref> (2009)
* ''[[Touhou Suimusou: Immaterial and Missing Power]]''((efn|name=Fanmade)) (2009)
* ''[[Street Fighter X Tekken]]''<ref>((cite web |url=https://www.eurogamer.net/articles/2012-03-09-capcom-looking-to-improve-street-fighter-x-tekken-online-sound-problems |title=Capcom looking to improve Street Fighter x Tekken online sound problems |last=Yin-Poole |first=Wesley |date=2012-03-09
|website=[[Eurogamer]] |access-date=2019-10-22 ))</ref> (2012)
* ''[[PlayStation All-Stars Battle Royale]]''<ref>((cite web |url=https://www.cheatcc.com/ps3/rev/playstationalstarsbattleroyalereview2.html |title=PlayStation All-Stars Battle Royale Review|last=D'Argenio|first=Angelo|date=2012-11-20|website=Cheat Code Central))</ref> (2012)
* ''[[Touhou Hisoutensoku]]''((efn|name=Fanmade))<ref>((cite web |url=https://hisouten.wordpress.com/2012/12/25/touhou-hisoutensoku-rollcaster-official-release/ |title=Touhou Hisoutensoku Rollcaster Official Release | date=2012-12-25 | access-date=2020-07-18 |quote=Thanks to Fireseal, Touhou Hisoutensoku can now be played with rollback enabled; long story short, intercontinental play with low delay is now possible. |website=#hisouten@irc.rizon.net))</ref> (2012)
* ''[[Killer Instinct (2013 video game)|Killer Instinct]]'' (2013)<ref>((cite web |url=http://www.killerinstinctcentral.com/exclusive-everything-we-know-about-killer-instinct-for-xbox-one/ |title=EXCLUSIVE: Everything We Know About Killer Instinct For Xbox One |publisher=Killer Instinct Central |date=September 9, 2013 |access-date=March 1, 2016))</ref>
* ''[[Killer Instinct (1994 video game)|Killer Instinct Classic]]''((efn|name=Patch))<ref>((cite web |url=https://www.siliconera.com/2014/12/23/killer-instinct-classic-getting-online-multiplayer/ |title=Killer Instinct Classic Getting Online Multiplayer |last=Sahdev |first=Ishaan |date=2014-12-23 |website=[[Siliconera]] |access-date=2019-10-22))</ref><ref>((cite tweet |user=CodeMystics |number=806737673184419840 |date=December 8, 2016 |title=FWIW, we do have rollback netcode (e.g. it's an option in KI Classic), which is what GGPO is, but not used in SNK products.))</ref> (2013)
* ''[[Killer Instinct 2 Classic]]'' (2014)
* ''Eternal Fighter Zero''((efn|name=Fanmade)) (2014)
* ''[[Melty Blood|Melty Blood Actress Again Current Code]]''((efn|name=Fanmade))<ref>((cite web |url=https://www.rpgsite.net/feature/4802-branching-path-melty-blood-actress-again-current-code-s-steam-version |title=Branching Path: Melty Blood Actress Again Current Code's Steam Version |last=Torres |first=Josh |date=2016-04-22 |website=RPG Site |access-date=2020-05-18 |quote=As a matter of fact, two very talented individuals from the Melty Blood community, Mauve and Madscientist, built custom online multiplayer clients for the PC versions of Act Cadenza Ver. B and Actress Again Current Code respectively. While they were easy to use after spending a little bit of time understanding their interface, it still required a separate program. These clients are still impressive to this day because they minimized input lag by incorporating rollback netcode (now seen in Street Fighter V) and kept frame stuttering or "laggy matches" to a minimum.))</ref><ref>((cite tweet |user=MadscientistCC |number=562006925756211200 |date=Feb 1, 2015 |title=Rollback is out))</ref> (2015)
* ''[[Brawlhalla]]'' (2015)
* ''[[Street Fighter V]]''<ref>((cite web |url=https://www.gamasutra.com/view/news/269805/Sponsored_Meet_the_company_behind_the_P2P_networking_of_Street_Fighter_V.php |title=Sponsored: Meet the company behind the P2P networking of Street Fighter V |author=Nettention |date=2016-04-06 |website=[[Gamasutra]] |access-date=2019-10-22 ))</ref> (2016)
* ''[[Mortal Kombat XL]]'' (2016)
* ''[[For Honor]]'' (2017)
* ''[[River City Ransom: Underground]]''<ref>((cite web |url=https://www.vice.com/en_us/article/gve373/reviving-river-city-ransom-and-reinventing-the-brawler |title=Reviving 'River City Ransom' and Reinventing the Brawler |last=Wright |first=Steven T. |date=2017-03-31 |website=[[Vice (magazine)|VICE]] |access-date=2020-01-29 |quote=Crenna and co. even coded the online multiplayer around a "rollback driver," a challenging technical feature usually reserved for popular fighting games like Street Fighter.))</ref> (2017)
* ''[[Injustice 2]]''<ref>((cite web |url=https://www.gamespot.com/articles/injustice-2-multiplayer-will-use-popular-fighting-/1100-6440904/ |title=E3 2016: Injustice 2 Multiplayer Will Use Popular Fighting Game Netcode |last=Paget |first=Mat |date=2016-07-14 |website=[[GameSpot]] |access-date=2019-10-04 |quote=He talked about the game's loot drops and gear system, but he also revealed that Injustice 2 will use GGPO netcode for its multiplayer.))</ref> (2017)
* ''[[Marvel vs. Capcom: Infinite]]''<ref>((cite web |url=https://kotaku.com/marvel-vs-capcom-infinite-wants-even-newbies-to-have-a-1794685310 |title=Marvel vs. Capcom Infinite Wants Even Newbies To Have A Blast |last=Walker |first=Ian |date=2017-04-27 |website=Kotaku |access-date=2020-01-11 |quote=Once players have a firm grasp on the fundamentals, they can hop online and test their burgeoning skills against worldwide opponents, one-on-one or in lobbies, using Capcom’s proprietary rollback netcode.))</ref> (2017)
* ''[[Umineko: Golden Fantasia]]''<ref>((cite web |url=http://blog.mangagamer.org/2017/12/07/golden-fantasia-rollback-netplay/ |title=Golden Fantasia & Rollback Netplay |author=<!--Not stated--> |date=2017-12-07 |website=MangaGamer Staff Blog |access-date=2019-10-22 |quote=Of course, once a game goes worldwide, this no longer holds true, and something has to be done to account for network issues, which is why we made a point of implementing rollback netplay into our version of Umineko: Golden Fantasia.))</ref> (2017)
* ''Acceleration of Suguri 2''<ref>((cite web |url=https://store.steampowered.com/app/390710/Acceleration_of_SUGURI_2/ |title=Acceleration of SUGURI 2 |author=<!--Not stated--> |website=Steam |access-date=2020-01-28 |quote=Online and Split-screen Multiplayer with rollback netcode))</ref> (2018)
* ''[[The King of Fighters '97|The King of Fighters '97 Global Match]]''((efn|name=Patch))<ref>((cite web |url=https://steamcommunity.com/games/702120/announcements/detail/3808235299525528256 |title=Rollback Netcode and Chinese UI localization! |author=<!--Not stated--> |date=2018-05-10 |website=Steam Community |access-date=2019-10-22 ))</ref> (2018)
* ''[[Street Fighter 30th Anniversary Collection]]''<ref>((cite web |url=https://blog.us.playstation.com/2018/03/20/street-fighter-30th-anniversary-collection-arrives-on-may-29-2018/ |title=Street Fighter 30th Anniversary Collection Arrives on May 29, 2018 |last=Wong |first=Andy |date=2018-03-20 |website=PlayStation.Blog |access-date=2019-10-22 |quote=Online play also features rollback technology that provides low-latency matches with the ability to adjust your own input buffer speed via the in-game menu to keep your online experience smooth.))</ref> (2018)
* ''[[Lethal League Blaze]]'' (2018)
* ''[[Mortal Kombat 11]]'' (2019)
* ''[[Fight of Gods]]''((efn|name=Patch))<ref>((cite web |url=https://steamcommunity.com/games/612930/announcements/detail/1625148260770416175 |title = Jesus is back!! Balance adjustment and new netcode tech (Roll back) online! |author=Digital Crafter Team | date=May 8, 2019 |website=Steam Community |access-date=February 26, 2020 |quote=On Net code, we were using delay base before this update. And this time we changed to (Roll Back) method, it should bring you better input experience. Please give it a try!))</ref> (2019)
* ''[[Samurai Shodown V Special]]''((efn|name=Patch))<ref>((cite tweet |user=CodeMystics |number=1141043370111819776 |date=June 18, 2019 |title=We're thrilled to team up with @SNKPofficial and @SamuraiShodown to offer you an "aperitif" as you wait to #EmbraceDeath. Play the UNCENSORED SamSho V Special on Windows (Steam or GOG) now with all the features of the PS4 version of SSVS, even online play!))</ref> (2019)
* ''[[Power Rangers: Battle for the Grid]]'' (2019)
* ''Fight of Animals''<ref>((cite tweet |user=FightofAnimals |number=1207815574652248065 |date=19 December 2019 |title=Rollback ))</ref> (2019)
* ''[[Garou: Mark of the Wolves]]''((efn|name=Patch))<ref>((cite tweet |user=CodeMystics |number=1220137581662240768 |date=January 22, 2020 |title=Thanks @SNKPofficial SNK for letting us bring #Garou: Mark of the Wolves into the Code Mystics rollback netcode family! :) PS4/Vita's patched & Steam/GOG versions are updated to our code too. (Fans of the Steam/GOG DotEmu version can still access it via beta code "dotemuversion"))))</ref> (2020)
* ''Maiden & Spell''<ref>((cite web |url=https://www.maidenspellgame.com/ |title=Maiden & Spell |access-date=2020-01-28 |quote=And yes, the online battles have rollback netcode.))</ref> (2020)
* ''Mighty Fight Federation''<ref>((cite tweet |user=FightMighty |number=1228425828750331904 |date=February 14, 2020 |title=In addition to our single player and local VS modes, Mighty Fight Federation features both Online Quickplay and Lobby matches for up to 4 players built on a rollback netcode system! Steam Early Access is available now!))</ref> (2020)
* ''[[The Last Blade 2]]''((efn|name=Patch))<ref>((cite tweet |user=krispykaiser |number=1253489135379025920 |date=April 23, 2020 |title=Before a release, we normally QC to make sure a game is running smoothly, but these are unusual times so we’d like to offer you a chance to beta test Code Mystics' newest rollback update on Steam: THE LAST BLADE 2.))</ref> (2020)
* ''Samurai Shodown NeoGeo Collection''<ref>((cite tweet |user=MikeJMika |number=1184588680654151680 |date=October 16, 2019 |title=It does have rollback. Switch suffers from how many simulations you can do for rollback due to CPU speed.))</ref> (2020)
* ''[[Super Smash Bros. Melee]]''((efn|name=Fanmade))<ref>((cite web |url=https://www.engadget.com/online-super-smash-bros-melee-slippi-004724839.html |title=Fan mod adds modern online features to 'Super Smash Bros. Melee' |last=Smajstrla |first=Ann |date=2020-06-23 |website=[[Engadget]] |access-date=2020-08-02))</ref> (2020)
* ''[[Fighting EX Layer]]''((efn|name=Patch))<ref>((cite web |url=https://www.siliconera.com/fighting-ex-layer-patch-includes-rollback-netcode/ |title=Fighting EX Layer Patched to Rollback Netcode in Latest Update |last=Wong |first=Alistair |date=2020-08-01 |website=[[Siliconera]] |access-date=2020-08-06 ))</ref> (2020)
* ''[[Spelunky 2]]''<ref>((cite tweet |user=mossmouth |number=1305944381321437184 |date=September 15, 2020 |title=FYI, Spelunky 2's online multiplayer uses rollback netcode and was designed for it from the beginning. ))</ref> (2020)
* ''[[The King of Fighters 2002: Unlimited Match]]''((efn|name=Patch))<ref>((cite tweet |user=SNKPofficial |number=1310481015685537793 |date=September 28, 2020 |title=Get ready because KOF 2002 UM is releasing an open community beta test for its upcoming rollback netcode patch on Steam! ))</ref> (2020)
* ''Dual Souls: The Last Bearer''((efn|name=Patch))<ref>((Cite tweet |user=GamesStun |number=1326264388806987781 |title=The new update for Dual Souls will include advanced training options to study complex scenarios as well as the #Rollback netcode!))</ref> (2020)
* ''Tough Love Arena''<ref>((Cite tweet |user=ToughLoveArena |number=1345083214101159936 |date=1 January 2021 |title=We want feedback on the rollback netcode, tutorials, and gameplay in general.))</ref> (2021)
* ''[[Guilty Gear Strive|Guilty Gear -Strive-]]''<ref>((cite press release |author=<!--Staff writer(s); no by-line.--> |title=[PRESS RELEASE] Guilty Gear -Strive- Closed Beta Test Sign-ups Start Today! |url=https://arcsystemworks.com/press-release-guilty-gear-strive-closed-beta-test-sign-ups-start-today/ |location=Rolling Hills Estates, California |publisher=Arc System Works |date=2020-03-18 |access-date=2020-03-19))</ref> (2021)
* ''[[Dengeki Bunko: Fighting Climax|Dengeki Bunko: Fighting Climax Ignition]]''((efn|name=Fanmade))<ref>((Cite tweet |user=DFCIACR |number=1363533948333281288 |title=The Open Beta Test (PC) for Dengeki Bunko Fighting Climax Ignition (DFCI) Unofficial Rollback has started.))</ref> (2021)
* ''[[Rivals of Aether]]''((efn|name=Patch))<ref>((Cite tweet |user=StudiosofAether |number=1377674197590106112 |date=April 1, 2021 |title=Rivals of Aether Rollback Open Beta arrives Summer 2021!))</ref> (2021)
* ''Petal Crash Online''((efn|name=Patch))<ref>((Cite tweet |user=PetalCrash |number=1447971008078487556 |title=Puzzle battle with your friends around the world with lobbies, rollback netcode, and tons of customization for players and gameplay!))</ref> (2021)
* ''[[Nickelodeon All-Star Brawl]]''<ref>((Cite web|url=https://www.shacknews.com/article/125575/nickelodeon-all-star-brawl-is-from-slap-city-devs-and-may-have-rollback-netcode|title=Nickelodeon All-Star Brawl is from Slap City devs and may have rollback netcode|website=[[Shacknews]]|first=Chris|last=Jarrard|date=July 13, 2021|access-date=July 13, 2021))</ref> (2021)
* ''[[The King of Fighters '98: Ultimate Match Final Edition]]''((efn|name=Patch))<ref>((cite tweet |user=SNKPofficial |number=1443441727134572550 |date=September 30, 2021 |title=Strap in tight because a major update (which includes rollback netcode) is coming to KOF '98 UM FINAL EDITION this winter for Steam! ))</ref> (2021)
* ''[[Windjammers 2]]''<ref>((cite web |url= https://www.pcgamer.com/windjammers-2-is-delayed-until-2021-so-developers-can-add-rollback-netcode/ |title=Windjammers 2 is delayed until 2021 so developers can add rollback netcode |author=  Andy Chalk |date= 2020-12-10 |access-date= 2020-12-18 |website= [[PC Gamer]]))</ref> (2022)
* ''[[BlazBlue: Central Fiction]]''((efn|name=Patch))<ref name="BBrollback">((Cite tweet |user=ArcSystemWorksU |number=1467701564689297416 |date=December 6, 2021 |title=We are proud to announce Rollback Netcode for #BlazBlueCentralfiction and #BlazBlueCrossTagBattle !))</ref> (2022)
* ''[[BlazBlue: Cross Tag Battle]]''((efn|name=Patch))<ref name="BBrollback" /> (2022)
* ''[[DNF Duel]]''<ref>((Cite tweet |user=DNFDuel |number=1471797331003539461 |title=DNF Duel supports rollback netcode.))</ref> (2022)
* ''[[MultiVersus]]''<ref>((cite magazine |last1=Leblanc |first1=Wesley |title=MultiVersus Announced, Will Feature Batman, Shaggy, Bugs Bunny, Arya Stark, Steven Universe, And More |url=https://www.gameinformer.com/2021/11/18/multiversus-announced-will-feature-batman-shaggy-bugs-bunny-arya-stark-steven-universe |magazine=Game Informer |access-date=19 November 2021 |archive-date=19 November 2021 |archive-url=https://web.archive.org/web/20211119170328/https://www.gameinformer.com/2021/11/18/multiversus-announced-will-feature-batman-shaggy-bugs-bunny-arya-stark-steven-universe |url-status=live ))</ref> (2022)
* ''[[Persona 4 Arena Ultimax]]''((efn|name=Patch))<ref>((Cite tweet |user=Atlus_west |number=1498133354016755712 |title=Rollback Netcode comes to Persona 4 Arena Ultimax this summer for Steam and PS4))</ref> (2022)
* ''[[Mega Man Battle Network]]''((efn|name=Fanmade))<ref name="BNTangorollback "/> (2022)
* ''[[Mega Man Battle Network 2]]''((efn|name=Fanmade))<ref name="BNTangorollback "/> (2022)
* ''[[Mega Man Battle Network 3]]''((efn|name=Fanmade))<ref>((cite web |url=https://www.n1gp.dev/bbn3/changelog |author=mars |website=n1gp.dev |title=MMBN3 PvP Balance Patch |quote=Lots of changes have been made under the hood in order to make BBN3 work with rollback netcode. |access-date=2021-09-26 |archive-date=2021-10-08 |archive-url=https://web.archive.org/web/20211008182935/https://www.n1gp.dev/bbn3/changelog |url-status=dead ))</ref><ref name="BNTangorollback">((cite web |url=https://tango.n1gp.net/ |website=Tango |title=Tango |quote=Works with every English and Japanese Battle Network game.
|access-date=2022-06-19))</ref> (2022)
* ''[[Mega Man Battle Network 4]]''((efn|name=Fanmade))<ref name="BNTangorollback "/> (2022)
* ''[[Rockman EXE 4.5 Real Operation]]''((efn|name=Fanmade))<ref name="BNTangorollback "/> (2022)
* ''[[Mega Man Battle Network 5]]''((efn|name=Fanmade))<ref name="BNTangorollback "/> (2022)
* ''[[Mega Man Battle Network 6]]''((efn|name=Fanmade))<ref name="BNTangorollback "/> (2022)
* ''[[Capcom Fighting Collection]]'' (2022)
* ''[[Teenage Mutant Ninja Turtles: Tournament Fighters]] SNES ver via [[Teenage Mutant Ninja Turtles: The Cowabunga Collection]]'' (2022)
* ''[[The Rumble Fish 2]]''<ref>((Cite web |last1=Romano |first1=Sal |title=The Rumble Fish 2 launches this winter for PS5, Xbox Series, PS4, Xbox One, Switch, and PC |url=https://www.gematsu.com/2022/08/the-rumble-fish-2-launches-this-winter-for-ps5-xbox-series-ps4-xbox-one-switch-and-pc |website=Gematsu |date=4 August 2022 |quote=Now with widescreen support, rollback netcode, and more.))</ref> (2022)
*''[[Guilty Gear Xrd | Guilty Gear Xrd REV 2]]''((efn|name=Patch)) (2023)
* ''IKEMEN-Go''<ref>((Cite tweet |user=intandemwith |number=1607433268059865090|title=Sorry for announcing rollback on Christmas and delaying it, but I still have a present for you IKEMEN-Go fans! Here's pre-alpha footage of rollback: US - UK!))</ref> (2023)
*''[[Street Fighter 6]]''<ref>((cite web|url=https://www.gematsu.com/2022/06/street-fighter-6-supports-rollback-netcode-cross-play|title=Street Fighter 6 supports rollback netcode, cross-play|last=Romano|first=Sal|website=Gematsu|date=June 10, 2022|access-date=June 10, 2022))</ref> (2023)
* ''[[Mortal Kombat 1]]''<ref>((cite web |url=https://www.mortalkombat.com/en-us/faq |title= Q: Will Mortal Kombat 1 have rollback netcode? A: Yes, Mortal Kombat 1 will have rollback netcode to support online gameplay.))</ref> (2023)
* ''[[The King of Fighters XIII|The King of Fighters XIII: Global Match]]''<ref>((Cite tweet |user=SNKPofficial |number=1642135974636560384 |title=Get ready for KOF XIII GLOBAL MATCH! Features rollback netcode and improved online functionality. OBT set for early summer 2023, so stay tuned for more updates! ))</ref> (2023) 
* ''[[Granblue Fantasy Versus: Rising]]''<ref>((Cite tweet |user=gbvs_official |number=1616703260261486592 |title=GBVSR features: Rollback Netcode and Crossplay))</ref> (2023)
* ''[[Tekken 8]]''<ref>((cite web |url=https://www.escapistmagazine.com/does-tekken-8-have-rollback-netcode/ |title=Does Tekken 8 Have Rollback Netcode? |last=Jones |first=Anthony |date=2023-12-27 |website=[[The Escapist (magazine)|The Escapist]] |publisher= |access-date=2024-01-23 |quote=))
</ref> (2024)
* ''Slayers for Hire''<ref>((cite web |url=https://www.kickstarter.com/projects/metagamesco/slayers-for-hire |title=Slayers for Hire Kickstarter |access-date=2019-11-28 |quote=We take netcode very seriously, and investigated several different solutions to give the best possible experience.  We ended up deciding on Photon's Quantum netcode, which you can read all about on their website. Quantum is a deterministic, server-based, rollback netcode.))</ref> (TBA)
* ''Fly Punch Boom!''<ref>((cite tweet |user=JollypunchGames |number=1213895107637850113 |date=January 5, 2020 |title=I got good rollback netcode! We've been playing #FlyPunchBoom tournaments across continents, and it still feels good.Still in beta though. Coming this year! Fire))</ref> (TBA)
* ''Rushdown Revolt''<ref>((cite web |url=https://store.steampowered.com/app/1376070/Rushdown_Revolt__PreBeta_Testing/ |author=Vortex Games |website=Steam |title=Rushdown Revolt - Pre-Beta Testing |quote=Vortex Rollback been in development for four years to fully embed it into every aspect of our game engine in order to minimize delay and rollback impacts. |access-date=2020-08-08))</ref> (TBA)
* ''MerFight: Curse of the Arctic Prince''<ref>((Cite tweet |user=mattrified |number=1366170827327209472 |title=Physical" test and demo of #MerFight's rollback/online.))</ref> (TBA)
* ''[[Stormgate]]''<ref>((cite web |url=https://www.pcgamer.com/an-upcoming-rts-will-incorporate-the-rollback-tech-that-took-fighting-games-by-storm/ |title=An upcoming RTS will incorporate the rollback tech that took Fighting games by storm |last=Bolding |first=Jonathan |date=2022-12-10 |website=PC Gamer |access-date=2023-02-07 ))</ref> (TBA)
* ''[[Dragon Ball FighterZ]]''((efn|name=Patch))(TBA)
* ''Metal Revolution''<ref>((cite tweet |user=Mtl_Revolution |number=1088265667319455744 |date=January 24, 2019 |title=Sorry, if we missed your question previously. It's gonna be a rollback netcode technique as same as in GGPO.))</ref> (Cancelled)
))

==See also==
* [[Fightcade]]
* [[Kaillera]]

==Notes==
((notelist|refs=
((efn|name=Patch|Rollback netcode added after release via patch.))
((efn|name=Fanmade|Rollback netcode added via fan-made patch.))
))

==References==
((reflist))

==External links==
* ((Official website))
* ((GitHub|pond3r/ggpo))

[[Category:2006 software]]
[[Category:Free and open-source software]]
[[Category:Middleware for video games]]
[[Category:PlayStation 3 software]]
[[Category:PlayStation 4 software]]
[[Category:Software using the MIT license]]
[[Category:Video game emulation]]
[[Category:Xbox One software]]
[[Category:Xbox 360 software]]
[[Category:Free software programmed in C]]
[[Category:Free software programmed in C++]]

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