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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Active

Pioneer

Clone of Elite II

An open-ended space adventure set in the 31st-century Milky Way, with millions of star systems to explore, trade in and fight over.

Platforms:WindowsLinux

Stars1,910

Updated1 month ago

LicenseUnknown

Release2011

Genre: Action

Theme: Sci-Fi

Active

Rogue Legacy

Clone of Rogue Legacy

The official Rogue Legacy source code release (FNA build), requiring your own copy's assets.

Platforms:Windows

Stars1,907

Updated3 months ago

LicenseUnknown

Release2024

Genre: Platform

Theme: Fantasy

Active

OpenLoco

Clone of Chris Sawyer's Locomotion

A complete C++ re-implementation of Chris Sawyer's Locomotion, aiming to improve it the way OpenTTD improved Transport Tycoon.

Platforms:WindowsLinuxOSX

Stars1,904

Updated1 month ago

LicenseMIT

Release2018

Genre: Strategy

Theme: Management

Active

Ancient Beast

Clone of Heroes of Might and Magic III

A browser-based, turn-based tactical strategy game played online in 1v1 or 2v2 matches with creatures that have unique abilities.

Platforms:Web

Stars1,880

Updated1 month ago

LicenseAGPL-3.0

Release2011

Genre: Turn-Based Strategy

Theme: —

Active

RBDOOM-3-BFG

Clone of Doom 3

RBDOOM-3-BFG is a deeply modernized DOOM 3 BFG source port with PBR rendering and DX12/Vulkan support.

Platforms:Windows

Stars1,854

Updated3 months ago

LicenseGPL-3.0

Release2012

Genre: FPS

Theme: Sci-Fi

Halted

Super Mario 64 (original game, not this project)

Original game image

sm64ex

Clone of Super Mario 64

An enhanced PC port of Super Mario 64 adding mouse-look camera, custom texture packs, and a cheats menu.

Platforms:N64

Stars1,834

Updated1 year ago

LicenseUnknown

Release2020

Genre: Platform

Theme: —

Halted

Wipeout (original game, not this project)

Original game image

HexGL

Clone of Wipeout

HexGL is a futuristic browser racing game built with HTML5 and WebGL, now in hiatus though outside patches are still welcome.

Platforms:Web

Stars1,742

Updated2 years ago

LicenseMIT

Release2012

Genre: Racing

Theme: Sci-Fi

Active

Original game image

Legend of Zelda: Majora's Mask

Clone of The Legend of Zelda: Majora's Mask

A work-in-progress decompilation of Majora's Mask built purely from analysis, targeting only NTSC-US 1.0, with no PC port planned.

Platforms:N64

Stars1,718

Updated2 months ago

LicenseUnknown

Release2020

Genre: Action

Theme: Fantasy

Active

Dune 2 (original game, not this project)

Original game image

OpenDUNE

Clone of Dune 2

A playable open-source re-creation of Westwood's Dune II that runs natively on many systems using the original data files.

Platforms:WindowsLinuxOSX

Stars1,688

Updated2 months ago

LicenseGPL-2.0

Release2012

Genre: Real-Time Strategy

Theme: Sci-Fi

Active

Hypersomnia

Clone of Hotline Miami

A free, open-source multiplayer top-down arena shooter in C++ with 24 firearms, a WYSIWYG map editor, and cross-platform networking.

Platforms:WebWindowsLinux

Stars1,644

Updated1 month ago

LicenseAGPL-3.0

Release2013

Genre: Shmup

Theme: Crime

Sporadic

Pacman 吃豆游戏

Clone of Pac-Man

A browser Pac-Man game by passer-by.com with 12 levels, power pellets and ghosts that path-find to the player.

Platforms:Web

Stars1,643

Updated6 months ago

LicenseMIT

Release2015

Genre: Arcade

Theme: —

Active

Pokémon Polished Crystal

Clone of Pokémon Gold and Silver

A fan-made hack of Pokémon Crystal adding modern mechanics and new content, built from an open-source disassembly.

Platforms:Game Boy

Stars1,642

Updated1 month ago

LicenseUnknown

Release2017

Genre: RPG

Theme: —

Sporadic

OpenSAGE

Clone of Command & Conquer: Generals

An early-stage, not-yet-playable open-source re-implementation of EA's SAGE engine, targeting C&C: Generals and Zero Hour.

Platforms:WindowsLinuxOSX

Stars1,635

Updated7 months ago

LicenseUnknown

Release2017

Genre: Real-Time Strategy

Theme: Sci-Fi

Archived

Clumsy Bird

Clone of Flappy Bird

A Flappy Bird clone built with the MelonJS engine, playable in the browser, with a customization guide included for reskinning it.

Platforms:Web

Stars1,622

Updated8 years ago

LicenseGPL-3.0

Release2014

Genre: Arcade

Theme: —

Active

Taisei Project

Clone of Touhou

An open-source bullet-hell shooter set in the Touhou universe, with an entirely original story, art, and music.

Platforms:WindowsLinuxOSX

Stars1,619

Updated2 months ago

LicenseUnknown

Release2010

Genre: Shmup

Theme: Anime

Sporadic

Quake 3 (original game, not this project)

Original game image

QuakeJS

Clone of Quake 3

A browser port of ioquake3 compiled with Emscripten — play Quake III Arena directly in your browser, no install needed.

Platforms:Web

Stars1,611

Updated11 months ago

LicenseUnknown

Release2013

Genre: FPS

Theme: Sci-Fi

Halted

Tower Building Game

Clone of Tower Bloxx Mini

A browser-based tower-stacking game built with ES6 and Canvas, based on Tower Bloxx Deluxe Skyscraper.

Platforms:Web

Stars1,608

Updated1 year ago

LicenseMIT

Release2018

Genre: Action

Theme: —

Active

Original game image

Paper Mario

Clone of Paper Mario

A work-in-progress decompilation of Paper Mario that builds the US, JP, PAL and iQue ROMs.

Platforms:N64

Stars1,607

Updated2 months ago

LicenseUnknown

Release2020

Genre: RPG

Theme: —

Active

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

Original game image

Pokémon FireRed and LeafGreen

Clone of Pokémon Red, Blue, and Yellow

A decompilation of Pokémon FireRed and LeafGreen, rebuilding byte-matching ROMs for six known release variants.

Platforms:GBA

Stars1,603

Updated3 months ago

LicenseUnknown

Release2017

Genre: RPG

Theme: Fantasy

Active

OpenGothic

Clone of Gothic

An open-source Gothic 2: Night of the Raven engine where the full game can be completed; requires the original game files.

Platforms:WindowsLinuxOSX

Stars1,601

Updated1 month ago

LicenseMIT

Release2019

Genre: RPG

Theme: —

Active

Freeciv

Clone of Civilization II

An open-source, GPLv2-licensed empire-building strategy game inspired by the history of human civilization, for Windows and Linux.

Platforms:WindowsLinux

Stars1,596

Updated1 month ago

LicenseGPL-2.0

Release2017

Genre: Turn-Based Strategy

Theme: —

Halted

Canabalt (original game, not this project)

Original game image

canabalt-ios

Clone of Canabalt

The official iOS source release of Canabalt from Semi Secret Software, with only the flixel-ios engine code under MIT license.

Platforms:iOS

Stars1,584

Updated15 years ago

LicenseUnknown

Release2010

Genre: Platform

Theme: —

Active

Minetest Game

Clone of Minecraft

The basic, mod-friendly sandbox game for the Luanti engine, with no set goals or enemy mobs.

Platforms:WindowsLinuxOSX

Stars1,560

Updated2 months ago

LicenseUnknown

Release2012

Genre: Action

Theme: Fantasy

Active

openblack

Clone of Black & White

An open-source C++ reimplementation of Lionhead's Black & White that runs on the original game's assets.

Platforms:WebWindowsLinux

Stars1,560

Updated3 months ago

LicenseGPL-3.0

Release2018

Genre: Simulation

Theme: Fantasy

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