Reimplementation
A new engine written from scratch that runs the original game's data, guided by reverse engineering. OpenTTD, OpenRCT2 and OpenMW are the classic examples.
GameMethodYearStarsLast push
DOSDoomSource releaseMatching decomp+8199320k2026-10-12DOSCommand & Conquer: Red AlertSource releaseReimplementation+3199618k2026-10-11DOSCommand & ConquerSource releaseReimplementation+2199518k2026-10-12PCRollerCoaster Tycoon 2ReimplementationAgent environment200216k2026-10-12PCDune 2000Reimplementation199818k2026-10-11WEB2048Source releaseReimplementation+1201413k2026-08-19PCAge of Empires IIReimplementation199914k2026-10-03PCCivilization VSource releaseReimplementation201011k2026-10-12PCDiablo IISource releaseMatching decomp+2200011k2026-10-12PCWorld of WarcraftReimplementationAgent environment20049.0k2026-10-12N64Super Mario 64Matching decompStatic recomp+419968.9k2026-10-11PCCraftReimplementation201311k2024-04-03PCDiabloMatching decompStatic recomp+219969.8k2026-10-11DOSTransport Tycoon DeluxeReimplementationDisassembly+119958.4k2026-10-12PCQuake III ArenaSource releaseReimplementation+319998.3k2026-10-10GBPokémon Red and BlueMatching decompAI-assisted decomp+419967.9k2026-10-12PCMinecraft: Java EditionReimplementationSource port+220117.6k2026-10-11N64The Legend of Zelda: Ocarina of TimeMatching decompStatic recomp+419987.4k2026-10-12APL2Prince of PersiaSource releaseStatic recomp+419896.9k2026-10-11DOSQuakeSource releaseMatching decomp+419966.1k2026-10-12WEBPokémon ShowdownReimplementationNative port+120116.0k2026-10-12PCHeroes of Might and Magic IIIMatching decompReimplementation+119995.9k2026-10-12PCThe Elder Scrolls III: MorrowindReimplementation20026.6k2026-10-12PCOld School RuneScapeReimplementationReadable bytecode+120135.5k2026-10-07PCHearthstoneReimplementationReadable bytecode20144.9k2026-10-10DOSSimCity 2000Static recompReimplementation+119935.3k2026-10-11PCTomb RaiderMatching decompDecomp+219965.1k2026-10-12SNESThe Legend of Zelda: A Link to the PastDecompStatic recomp+419914.8k2026-10-12PCCommand & Conquer: Generals Zero HourSource releaseReimplementation+220034.7k2026-09-23PCTheme HospitalMatching decompReimplementation19974.6k2026-10-12OTHCeleste ClassicSource releaseReimplementation+320154.0k2025-09-21GBCPokémon Gold and SilverMatching decompDecomp+419993.9k2026-10-12PCHalf-LifeSource releaseMatching decomp+319984.4k2026-10-12PCBeyond All ReasonSource releaseReimplementation20214.3k2026-10-12PCHeroes of Might and Magic IIMatching decompReimplementation+119963.5k2026-10-12NESSuper Mario Bros.Source releaseMatching decomp+719853.2k2026-10-07PCSpace Station 14Source releaseReimplementation20233.9k2026-10-12PS2Jak 3DecompReimplementation+120043.6k2026-10-05PS2Jak IIDecompReimplementation+120033.6k2026-10-05PCCounter-StrikeDecompAI-assisted decomp+520002.8k2026-10-11DOSThe Elder Scrolls II: DaggerfallMatching decompReimplementation+119963.5k2026-10-07PCMagic: The GatheringMatching decompDecomp+119932.8k2026-10-12PCCaesar IIIReimplementation19983.4k2026-09-12PS2Grand Theft Auto: San AndreasReimplementationAgent environment20042.6k2026-10-12MULTZork I: The Great Underground EmpireSource releaseReimplementation19803.0k2025-11-20PCSuper Mario Bros. RemasteredReimplementation20253.2k2026-09-27MOBAmong UsReimplementationNative port+220182.4k2026-10-09PS1WipeoutStatic recompReimplementation+219953.0k2026-10-02DOSHeroes of Jin Yong (金庸群侠传)Reimplementation19963.0k2026-10-06DOSFalloutMatching decompDecomp+319972.9k2026-10-12DOSX-COM: UFO DefenseStatic recompReimplementation+119942.2k2026-09-28PCSerious Sam: The First EncounterSource releaseReimplementation+120013.2k2026-04-07PCFreecivSource releaseReimplementation+119962.2k2026-10-12DOSWolfenstein 3DSource releaseAI-assisted decomp+419922.5k2026-10-11PCFallout 2Matching decompReimplementation19982.5k2026-10-03PCStarCraft: Brood WarMatching decompDecomp+219981.7k2026-10-06PS2Grand Theft Auto IIIReimplementationSource port+120012.2k2026-10-11PCMinecraft ClassicReimplementation20092.1k2026-10-11DOSThe Legend of Sword and FairyReimplementation19952.0k2026-10-05PCChris Sawyer's LocomotionReimplementation20041.9k2026-10-06MOBMinecraft: Pocket EditionMatching decompReimplementation+220111.7k2026-10-12MACAresSource releaseMatching decomp+119961.8k2026-10-06MOBPlants vs. Zombies 2ReimplementationSource port+220131.7k2026-10-10DOSDune II: The Building of a DynastyReimplementationSource port19921.7k2026-10-11PCPlants vs. ZombiesMatching decompDecomp+520091.2k2026-10-12PCGothicReimplementation20011.6k2026-10-11PCGothic IIReimplementation20021.6k2026-10-11WIIMario Kart WiiMatching decompStatic recomp+520081.1k2026-10-12X360Skate 3Static recompReimplementation20101.6k2026-10-11PCBlack & WhiteMatching decompStatic recomp+120011.6k2026-10-12DSNew Super Mario Bros.Matching decompReimplementation+120061.1k2026-10-12PCPikachu VolleyballReimplementation19971.1k2026-10-02PS4P.T.AI-assisted decompReimplementation+120141.5k2026-10-11PCUnreal TournamentSource releaseStatic recomp+319991.5k2026-10-12DOSSystem ShockSource releaseReimplementation+219941.5k2026-09-08DOSThe Elder Scrolls: ArenaReimplementation19941.4k2026-10-08MOBFlappy BirdDecompReimplementation+220131.2k2026-02-17PCCommand & Conquer: GeneralsReimplementation20031.6k2026-03-30PS1Driver 2Reimplementation20001.4k2026-09-22PCTripleAReimplementation1.6k2026-10-12AMIAnother WorldMatching decompReimplementation+219919192026-10-11GBCThe Legend of Zelda: Link's Awakening DXStatic recompReimplementation+419989082026-09-25PCCave StoryMatching decompStatic recomp+120041.3k2026-09-04GBPokémon YellowMatching decompStatic recomp+319988872026-10-12ARCOut RunSource releaseReimplementation+219868792026-10-11PS2SingStarReimplementation20041.3k2026-10-10PCBaldur's GateReimplementation19981.3k2026-10-123DOThe Need for SpeedStatic recompReimplementation+119948442026-08-23PCOvercooked!ReimplementationAgent environment20161.0k2025-03-22DOSCarmageddonMatching decompDecomp+119971.2k2026-10-12XBOXStar Wars: Knights of the Old RepublicStatic recompReimplementation+120031.2k2026-10-10PCNeverwinter NightsReimplementation20021.2k2026-10-09PCFreedoomReimplementation20191.4k2026-10-02DOSStar Wars: Dark ForcesReimplementation19951.2k2026-10-12PCOutlawsReimplementation19971.2k2026-10-12PCCommand & Conquer: Red Alert 2Source releaseDecomp+320001.1k2026-10-12PCTrackMania Nations ForeverMatching decompReimplementation+120087472026-09-30PCUnrealSource releaseReimplementation19981.1k2026-10-11PCAce of SpadesReimplementation20121.2k2025-07-30DOSDungeon KeeperSource releaseDecomp+119971.0k2026-10-11MDSonic 3 & KnucklesMatching decompStatic recomp+219946532026-10-12DOSDuke Nukem IIMatching decompReimplementation19931.0k2026-09-28ARCDefenderSource releaseStatic recomp+219816432026-07-20SNESSuper Mario WorldMatching decompDecomp+519906382026-10-12ARCSpace InvadersReimplementationDisassembly19787982022-09-18PCThe Sims OnlineReimplementation20029822026-10-12X360Call of Duty: Modern Warfare 2AI-assisted decompStatic recomp+120099742026-10-11PCUnvanquishedReimplementation1.1k2026-10-12PCTouhou 6: The Embodiment of Scarlet DevilMatching decompReimplementation+220026132026-10-12ARCPac-ManSource releaseMatching decomp+519805942026-10-10PCHard VacuumReimplementation1.1k2026-09-27PCMight and Magic VI: The Mandate of HeavenDecompReimplementation19988712026-10-11PCZero-KSource releaseReimplementation20188672026-10-12PCSlay the SpireReimplementationReadable bytecode+120195202026-10-12PCSlay the Spire 2ReimplementationReadable bytecode+120265122026-10-07MACMarathonMatching decompReimplementation+119948132026-10-11GCMetroid PrimeMatching decompStatic recomp+220027932026-10-12PCStar Wars Jedi Knight: Dark Forces IIReimplementation19977632026-10-11DOSWarcraft II: Tides of DarknessReimplementationAgent environment19954412026-10-10PCVangersSource releaseReimplementation+119987372026-10-06PCUltima OnlineMatching decompDecomp+119977342026-09-29PCAge of EmpiresReimplementationAgent environment+119974312026-09-22PCYGOProReimplementationAgent environment19994232026-10-09DOSBloodSource releaseReimplementation+119978862025-11-19PCJazz Jackrabbit 2Matching decompReimplementation19987142026-10-12DOSSid Meier's ColonizationReimplementation19947132026-10-12ARCOutRunReimplementation19868792023-12-26PS1Final Fantasy IXMatching decompStatic recomp+220007082026-10-12PCTotal AnnihilationMatching decompStatic recomp+219977032026-10-12DOSUltima VII: The Black GateAI-assisted decompStatic recomp+219926922026-10-12PCKeeperRLReimplementation1.0k2025-10-27GBASonic Advance 2Matching decompReimplementation+220026752026-09-16PS1Final Fantasy VIIIMatching decompStatic recomp+219996732026-10-11PCOoliteReimplementation20036712026-10-09PCCivilization IIIReimplementation20016652026-10-11PCMedal of Honor: Allied AssaultReimplementation20028272026-04-23MOBClash RoyaleReimplementationAgent environment20163722026-10-10DOSDescentSource releaseReimplementation+119956402026-10-11SNESSuper Mario All-StarsStatic recompReimplementation+119936382026-10-06PCSid Meier's Alpha CentauriDecompReimplementation19996382026-10-11PCEverQuestReimplementation19996352026-08-26PCPortalReimplementation20076242026-10-05PCPenumbra: OvertureSource releaseReimplementation20077792023-03-22DSPokémon HeartGold and SoulSilverMatching decompStatic recomp+120096162026-10-12PCFreelancerMatching decompReimplementation20036122026-10-10AMICannon FodderReimplementation19936052026-10-04DOSThe Settlers IIReimplementation19965962026-10-06PCX-COM: ApocalypseReimplementation19975972026-09-16PC北京浮生记Source releaseReimplementation5952026-09-15PCSimTowerReimplementation19945902026-09-12DOSTyrianReimplementationSource port19955812026-10-10PCWarcraft III: Reign of ChaosReimplementation20025742026-10-05WEBAgar.ioReimplementation20157242020-09-27DOSGrand Theft AutoMatching decompDecomp+219975662026-08-26SNESSuper MetroidMatching decompDecomp+419945562026-10-12PCVictoria IIReimplementation20105542026-10-09PS1The Legend of DragoonStatic recompReimplementation19995462026-10-11DOSLittle Big Adventure 2Source releaseReimplementation+119975402026-10-09AMIAmbermoonSource releaseReimplementation19935402026-10-06PCJagged Alliance 2Source releaseReimplementation+119995392026-10-12NESTetrisStatic recompReimplementation+319892822026-09-30MOBTiny WingsReimplementationRE candidate20118112022-09-11PCRuneScapeDecompReimplementation+220042792026-10-08NESThe Legend of ZeldaMatching decompStatic recomp+319862752026-10-07PCCall of Duty 4: Modern WarfareStatic recompReimplementation+120075102026-10-11PCDungeon Keeper 2Static recompReimplementation19995062026-10-06DOSSid Meier's CivilizationDecompStatic recomp+219912622026-10-07PCThe SimsDecompReimplementation20004992026-10-03BBCEliteSource releaseDecomp+219844882026-10-10MOBGeometry DashMatching decompDecomp+220132482026-10-12DOSOne Must Fall: 2097ReimplementationSource port19944842026-10-11PCJianxia Qingyuan Waizhuan: Yueying ChuanshuoReimplementation4792026-09-063DSThe Legend of Zelda: Ocarina of Time 3DMatching decompDecomp+220114742026-10-04DOSLittle Big AdventureSource releaseReimplementation+119944702026-10-02SNESDonkey Kong CountryDecompStatic recomp+219942332026-10-08PCTeamfight TacticsReimplementation20192292026-10-08WEBQWOPReimplementationReadable bytecode20082292026-07-21PCCommand & Conquer: Tiberian SunMatching decompDecomp+319995702026-10-11XBOXHalo: Combat EvolvedMatching decompDecomp+420014472026-10-12PS1Oddworld: Abe's OddyseeDecompStatic recomp+119974412026-10-01PCThe Sims 2Reimplementation20044272026-07-25N64Diddy Kong RacingMatching decompStatic recomp+219974222026-10-12PS2Grand Theft Auto: Vice CityDecompReimplementation+220024122026-10-06DOSJazz JackrabbitReimplementation19944092026-09-01PCBaba Is YouReimplementationReadable bytecode+220191912026-10-10PCTomb Raider ChroniclesDecompReimplementation+120005202024-05-12WIIWii Play: Tanks!ReimplementationAgent environment20061832026-10-12X360Forza HorizonStatic recompReimplementation20123912026-10-12PCCaptain ClawReimplementation19975142022-10-24WEBslither.ioReimplementation20162692016-06-01PCBVE TrainsimReimplementation3792026-10-12PCRocket LeagueReimplementationAgent environment20152522026-05-16PS2The Simpsons: Hit & RunReimplementation20034852024-03-27PCStar Wars Episode I: RacerMatching decompDecomp+219993492026-10-05ARCContraReimplementationDisassembly+119872312026-06-14DOSRaptor: Call of the ShadowsSource releaseReimplementation+119943402026-10-04AMIThe SettlersReimplementation19933392026-10-12PCAmerican McGee's AliceSource releaseReimplementation20003302026-10-09DOSStar Wars: TIE FighterStatic recompReimplementation19943282026-10-04DOSUltima UnderworldMatching decompDecomp+319923282026-10-12DOSImperium GalacticaReimplementation19973262026-08-10WEBgenerals.ioReimplementationAgent environment20161242026-10-10WIISonic and the Secret RingsReimplementation20072972026-10-07PS1Resident Evil 2ReimplementationRE candidate19982912026-08-17PCGrim FandangoReimplementation19984012024-09-08DOSPanzer GeneralReimplementationAgent environment19941872021-02-27NESFinal FantasyReimplementationSource port+119871062026-10-02N64Doom 64Matching decompReimplementation+119972742026-10-12PS2Sly Cooper and the Thievius RaccoonusMatching decompReimplementation20022702026-10-11PCHeretic IISource releaseReimplementation19982682026-10-11DSMetroid Prime HuntersStatic recompReimplementation20062592026-10-11X360Marble Blast UltraReimplementation20062582026-10-07PCRollerCoaster TycoonReimplementation19992562026-10-08PCLEGO RacersMatching decompDecomp+41999912026-10-03APL2Wizardry: Proving Grounds of the Mad OverlordReimplementation19812442026-09-30DOSDangerous DaveAI-assisted decompReimplementation+21990872026-09-18GBTetrisMatching decompStatic recomp+31989852026-10-06WEBHabbo HotelReimplementation20003292026-06-29PCBalatroReimplementationReadable bytecode+12024772026-09-26PCMegaGlestReimplementation4192026-06-29DOSCommander Keen in Invasion of the VorticonsMatching decompDecomp+219902232026-09-30DOSMaster of OrionReimplementation19932212026-10-12X360Alan WakeReimplementation20102202026-10-11GBCThe Legend of Zelda: Oracle of AgesMatching decompStatic recomp+420012192026-10-12DOSCommander Keen in Goodbye, Galaxy!Matching decompDecomp+219913162026-07-12SNESStar FoxMatching decompStatic recomp+21993712026-10-12GBSuper Mario LandStatic recompReimplementation+21989692026-09-27PSPGrand Theft Auto: Liberty City StoriesDecompStatic recomp+220052092026-10-09DOSSupaplexMatching decompReimplementation+119913032026-03-30PCInfinite Mario BrosReimplementation20081242025-01-20GBAGolden SunMatching decompStatic recomp+320012072026-10-11DSMario Kart DSMatching decompDecomp+32005622026-10-10PCKnights and Merchants: The Shattered KingdomReimplementation19983772026-06-23DOSSkyRoadsMatching decompAI-assisted decomp+119931912026-09-17DOSLieroSource releaseReimplementation19982822026-06-23PCStrongholdReimplementation20012792024-07-08PS2Burnout 3: TakedownMatching decompStatic recomp+120041872026-10-09PS2Silent Hill 3Matching decompStatic recomp+120031872026-10-12DOSSyndicate WarsDecompReimplementation19962612026-10-12WEBsurviv.ioReimplementation20171852026-10-10DOSPrince of Persia 2: The Shadow and the FlameDecompAI-assisted decomp+31993532026-10-12SNESEarthBoundMatching decompDecomp+419941832026-10-12WEBClub PenguinReimplementation20051832026-10-10MOBAngry BirdsMatching decompReimplementation+42009502026-10-11OTHTetrisMatching decompReimplementation+11984492026-07-26NESZelda II: The Adventure of LinkStatic recompReimplementation+119871752026-10-10AMIPinball FantasiesSource releaseReimplementation+119921742026-10-12PCZeus: Master of OlympusReimplementation20001732026-09-16DOSAbuseSource releaseReimplementation+119961702026-10-05PCRomanov's VengeanceReimplementation3442025-07-26