Free & Open Source Clones & Decompilations of Retro Games

4,049 open-source clones, remakes and decompilations of 2,426 retro games — real source code you can read, fork, and play today, not just a free download.

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Sporadic

Original game image

Zork III Source Code Collection

Clone of Zork

The original 1982 ZIL source code for Infocom's Zork III, preserved as an anonymously contributed development snapshot.

Platforms:None

Stars916

Updated11 months ago

LicenseMIT

Release2019

Genre: Adventure

Theme: —

Halted

NEO-RAW

Clone of Another World

A readability-focused reimplementation of the Another World engine; needs the original PC DOS game data.

Platforms:Linux

Stars913

Updated1 year ago

LicenseGPL-2.0

Release2011

Genre: Adventure

Theme: Sci-Fi

Halted

bash2048

Clone of 2048

bash2048 is a deprecated, unmaintained Bash shell-script implementation of 2048, controlled with the arrow keys.

Platforms:Linux

Stars910

Updated2 years ago

LicenseUnlicense

Release2014

Genre: Puzzle

Theme: —

Active

No preview

Link's Awakening DX Decompilation

A disassembly of Link's Awakening DX that builds Japanese, English, German and French ROMs and Virtual Console patches.

Stars904

Updated1 month ago

LicenseUnknown

Release2015

Genre: —

Theme: —

Active

Unknown Horizons

Clone of Anno series

An early, not-yet-playable Godot 4 rewrite of the Anno-style city-building RTS Unknown Horizons.

Platforms:WindowsLinux

Stars902

Updated1 month ago

LicenseGPL-2.0

Release2019

Genre: Real-Time Strategy

Theme: —

Active

Shockolate

Clone of System Shock

An SDL2 cross-platform source port of System Shock, based on Night Dive Studios' released PowerPC source.

Platforms:WindowsLinuxOSX

Stars900

Updated2 months ago

LicenseGPL-3.0

Release2018

Genre: RPG

Theme: —

Archived

Storm Engine

Clone of Age of Pirates 2: City of Abandoned Ships

The open-source engine behind the Sea Dogs, Pirates of the Caribbean, and Age of Pirates games, now archived and community-maintained.

Platforms:Windows

Stars898

Updated3 years ago

LicenseGPL-3.0

Release2020

Genre: Action

Theme: —

Sporadic

Original game image

The Legend of Zelda: The Minish Cap

Clone of The Legend of Zelda: The Minish Cap

This is a work-in-progress decompilation of The Minish Cap for Game Boy Advance, built from a retail or demo ROM you supply.

Platforms:GBA

Stars894

Updated9 months ago

LicenseUnknown

Release2020

Genre: Action

Theme: —

Active

qengine

Clone of Quake 2

A stripped-down engine forked from Quake II's codebase, built as a base for new standalone retro games, not for playing Quake II.

Platforms:WindowsLinux

Stars892

Updated2 months ago

LicenseGPL-2.0

Release2018

Genre: FPS

Theme: Sci-Fi

Halted

Fallout 2 (original game, not this project)

Original game image

Falltergeist

Clone of Fallout 2

Falltergeist is an open-source, C++ reimplementation of the Fallout 2 engine, requiring original game data files, and currently unplayable.

Platforms:WindowsLinux

Stars890

Updated3 years ago

LicenseGPL-3.0

Release2012

Genre: RPG

Theme: —

Sporadic

Original game image

Raze

Clone of Blood

Raze is a GZDoom-powered source port that runs Duke Nukem 3D, Blood, Shadow Warrior, and other Build-engine games.

Platforms:WindowsOSX

Stars885

Updated11 months ago

LicenseUnknown

Release2019

Genre: FPS

Theme: —

Active

Pokémon Red, Blue, and Yellow (original game, not this project)

Original game image

Pokémon Yellow

Clone of Pokémon Red, Blue, and Yellow

A disassembly that rebuilds Pokémon Yellow's Game Boy ROM entirely from source code.

Platforms:Game Boy

Stars875

Updated2 months ago

LicenseUnknown

Release2015

Genre: RPG

Theme: Fantasy

Halted

Cannonball

Clone of Out Run

Cannonball is a from-scratch C++ rewrite of the OutRun arcade engine, adding higher frame rates and widescreen support.

Platforms:Windows

Stars871

Updated2 years ago

LicenseUnknown

Release2012

Genre: Arcade

Theme: —

Sporadic

GoldenEye 007 (original game, not this project)

Original game image

GoldenEye 007 Recompilation

Clone of GoldenEye 007

A work-in-progress native PC recompilation of the Xbox 360 GoldenEye 007 with online multiplayer and higher FPS.

Stars871

Updated4 months ago

LicenseUnlicense

Release2026

Genre: FPS

Theme: —

Active

EmptyEpsilon

Clone of Artemis: Spaceship Bridge Simulator

EmptyEpsilon is an open-source game that began as an Artemis Spaceship Bridge Simulator clone but has since diverged with new features.

Platforms:WindowsLinuxAndroid

Stars869

Updated2 months ago

LicenseGPL-2.0

Release2014

Genre: Simulation

Theme: Sci-Fi

Active

SLADE

Clone of Doom

SLADE3 is an all-in-one editor for Doom-engine games, merging the older SLumpEd and SLADE map-editing tools into one program.

Platforms:WindowsLinuxOSX

Stars868

Updated2 months ago

LicenseGPL-2.0

Release2012

Genre: FPS

Theme: Sci-Fi

Halted

TES3MP

Clone of The Elder Scrolls III: Morrowind

An OpenMW-based mod that adds full online multiplayer to The Elder Scrolls III: Morrowind.

Platforms:Windows

Stars868

Updated2 years ago

LicenseGPL-3.0

Release2016

Genre: RPG

Theme: Fantasy

Sporadic

ReC98

Clone of Touhou

A community-funded project reconstructing bit-identical source code for the first five PC-98 Touhou games.

Platforms:Windows

Stars863

Updated7 months ago

LicenseUnknown

Release2014

Genre: Shmup

Theme: Anime

Active

OpenEnroth

Clone of Might and Magic VI: The Mandate of Heaven

An open-source Might & Magic VI-VIII engine reimplementation, currently able to play Might and Magic VII on modern systems.

Platforms:WindowsLinuxOSX

Stars858

Updated1 month ago

LicenseLGPL-3.0

Release2016

Genre: RPG

Theme: Fantasy

Active

Silent Hill (original game, not this project)

Original game image

silent-hill-decomp

Clone of Silent Hill

A human-led, in-progress decompilation of the original PS1 Silent Hill aiming for a byte-identical rebuild, not a port.

Platforms:PS

Stars852

Updated1 month ago

LicenseUnknown

Release2021

Genre: Action

Theme: Horror

Active

Halo: Combat Evolved Port

Clone of Halo: Combat Evolved

A port of the Halo: Combat Evolved Xbox decompilation to Linux, Windows and Android; you supply a disc image.

Stars850

Updated1 month ago

LicenseCC0-1.0

Release2026

Genre: FPS

Theme: —

Sporadic

Original game image

Mario Party 4

Clone of Mario Party 4

Mario Party 4 is a work-in-progress decompilation of the GameCube original, with both USA ROM revisions building byte-for-byte matching.

Platforms:GameCube

Stars842

Updated5 months ago

LicenseUnknown

Release2023

Genre: Party

Theme: —

Sporadic

Original game image

Zork II Source Code Collection

Clone of Zork

The original 1981 ZIL source code for Infocom's Zork II, preserved as an anonymously contributed development snapshot.

Platforms:None

Stars842

Updated11 months ago

LicenseMIT

Release2019

Genre: Adventure

Theme: —

Active

Castlevania: Symphony of the Night (original game, not this project)

Original game image

Castlevania: Symphony of the Night Recompilation

Clone of Castlevania: Symphony of the Night

SymphonyRecomp is an open-beta PlayStation recompilation of Castlevania: Symphony of the Night for modern PCs.

Stars835

Updated1 month ago

LicenseUnknown

Release2026

Genre: RPG

Theme: Horror

People are curious about clones of...

Games you know, and the open-source projects that recreate them.

View all originals

Minecraft

2009Action

The block-building sandbox that reshaped an entire genre — open-source clones range from full Java reimplementations to engines built from scratch.

43 clones to play

Doom

1993FPS

The 1993 shooter that defined the genre and sparked a modding culture still alive today — its source release made it one of gaming's most-cloned engines.

40 clones to play

Quake

1996FPS

id Software's fully-3D follow-up to Doom — its GPL-released source (QuakeC included) made it one of the most forked engines in open-source gaming.

20 clones to play

Super Mario

1985Platform

The NES platformer that made side-scrolling mainstream — open-source engines recreate its physics and level format down to the pixel.

20 clones to play

Legend of Zelda - A Link to the Past

1991Action

The SNES classic that set the template for top-down action-adventure — its engine and tile format have been reverse-engineered many times over.

20 clones to play

Diablo II

2000RPG

Blizzard North's dungeon-crawler that defined the ARPG genre — reverse-engineered projects like OpenDiablo2 rebuild it from the original assets up.

6 clones to play

Grand Theft Auto III

2001Action

The open-world franchise everyone's talking about again — its early file formats and engines have been reverse-engineered for years, well before GTA 6 hype.

4 clones to play

StarCraft

1998Real-Time Strategy

Blizzard's 1998 real-time strategy game that helped build esports as we know it — open-source engines keep its campaign and balance playable today.

5 clones to play

Sonic the Hedgehog

1991Platform

Sega's answer to Mario — its physics and level format have been painstakingly reverse-engineered by fan projects for decades.

8 clones to play