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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Halted

Original game image

DOOM-FX

Clone of Doom

Platforms:SNES

Stars1,248

Updated4 years ago

LicenseGPL-3.0

Release2020

Genre: FPS

Theme: Sci-Fi

Active

Bemuse

Clone of Beatmania IIDX

Bemuse is an open-source, browser-based rhythm game inspired by Beatmania IIDX, played via a 7-key keyboard or BMS mode.

Platforms:Web

Stars1,247

Updated2 months ago

LicenseAGPL-3.0

Release2014

Genre: Rhythm

Theme: —

Active

Colobot: Gold Edition

Clone of Colobot

Colobot: Gold Edition is an open-source continuation of Colobot for Windows, Linux, and macOS, built by TerranovaTeam and contributors.

Platforms:WindowsLinuxOSX

Stars1,245

Updated3 months ago

LicenseGPL-3.0

Release2012

Genre: Educational

Theme: Sci-Fi

Halted

OpenSpades

Clone of Ace of Spades

An open-source, cross-platform client for Ace of Spades 0.75 that connects to vanilla, pyspades and pysnip servers.

Platforms:WindowsOSX

Stars1,245

Updated2 years ago

LicenseGPL-3.0

Release2013

Genre: FPS

Theme: World War II

Active

Rigs of Rods

Clone of BeamNG.drive

An open-source soft-body vehicle physics sandbox with online multiplayer, simulating cars, trucks, boats, and aircraft.

Platforms:WindowsLinux

Stars1,245

Updated2 months ago

LicenseGPL-3.0

Release2014

Genre: Simulation

Theme: —

Halted

Diablerie

Clone of Diablo II

Diablerie is an early-stage, work-in-progress Diablo II recreation in Unity, requiring the player's own copy of the original game data.

Platforms:WindowsLinux

Stars1,235

Updated3 years ago

LicenseMIT

Release2017

Genre: RPG

Theme: Fantasy

Active

EasyRPG Player

Clone of RPG Maker

EasyRPG Player is an open-source interpreter that plays RPG Maker 2000/2003 games, running on Windows, macOS, Linux, and Android.

Platforms:WindowsLinuxOSX

Stars1,221

Updated2 months ago

LicenseGPL-3.0

Release2012

Genre: RPG

Theme: —

Sporadic

Pac Go

Clone of Pac-Man

A terminal Pac-Man clone in Go that uses emojis, built as a step-by-step tutorial for learning the language.

Platforms:WindowsLinuxOSX

Stars1,219

Updated11 months ago

LicenseMIT

Release2018

Genre: Arcade

Theme: —

Active

Cube 2: Sauerbraten (original game, not this project)

Original game image

Inexor

Clone of Cube 2: Sauerbraten

Inexor is an open-source, MIT-licensed C++/Vulkan renderer for a planned 3D octree game engine, running on Windows and Linux.

Platforms:WindowsLinux

Stars1,218

Updated3 months ago

LicenseMIT

Release2019

Genre: FPS

Theme: —

Active

Dethrace

Clone of Carmageddon

Dethrace is a from-scratch reimplementation of Carmageddon (1997) in C, requiring an existing original game installation to run.

Platforms:Windows

Stars1,193

Updated2 months ago

LicenseGPL-3.0

Release2019

Genre: Racing

Theme: —

Active

DRL

Clone of Doom

DRL (DoomRL) is a free, open-source turn-based roguelike written in FreePascal, with code dating back to 2002.

Platforms:WindowsLinux

Stars1,179

Updated1 month ago

LicenseGPL-2.0

Release2016

Genre: FPS

Theme: Sci-Fi

Active

xoreos

Clone of Dragon Age II

An open-source reimplementation of BioWare's Aurora engine, aiming to run NWN through Dragon Age II — no game has full gameplay yet.

Platforms:WindowsLinuxOSX

Stars1,173

Updated2 months ago

LicenseGPL-3.0

Release2010

Genre: RPG

Theme: Fantasy

Halted

Original game image

doom3do

Clone of Doom

This is the archived 3DO port of DOOM by Rebecca Ann Heineman, using the 3DO's cell engine for walls and software-rendered floors.

Platforms:3DO

Stars1,172

Updated3 years ago

LicenseMIT

Release2014

Genre: FPS

Theme: Sci-Fi

Active

The Force Engine

Clone of Dark Forces

The Force Engine is a reverse-engineered rebuild of the Jedi Engine, currently offering full Dark Forces support with modern upgrades.

Platforms:Windows

Stars1,159

Updated1 month ago

LicenseGPL-2.0

Release2020

Genre: FPS

Theme: —

Halted

Javascript Pseudo 3D Racer

Clone of Out Run

Javascript Pseudo 3D Racer is an Outrun-style pseudo-3D racing tech demo in HTML5/JavaScript, built as a four-stage teaching series.

Platforms:Web

Stars1,157

Updated1 year ago

LicenseMIT

Release2012

Genre: Arcade

Theme: —

Active

No preview

Sonic 1 and 2 Decompilation

A decompilation of Retro Engine v4 and the menus from Sonic 1 and 2 (2013); official game assets are required.

Stars1,141

Updated2 months ago

LicenseUnknown

Release2020

Genre: —

Theme: —

Active

Tuxemon

Clone of Pokémon

Tuxemon is an open-source, Pokémon-style monster-fighting RPG with 393 original creatures.

Platforms:WindowsLinuxOSX

Stars1,134

Updated3 months ago

LicenseGPL-3.0

Release2014

Genre: RPG

Theme: —

Archived

World in Conflict (original game, not this project)

Original game image

World in Conflict Massgate

Clone of World in Conflict

An open-sourced revival of World in Conflict's Massgate server, letting anyone self-host the game's online multiplayer backend.

Platforms:Windows

Stars1,134

Updated8 years ago

LicenseGPL-2.0

Release2017

Genre: Real-Time Tactics

Theme: —

Active

RA2

Clone of Command & Conquer: Red Alert 2

An OpenRA-engine mod recreating Command & Conquer: Red Alert 2 for Windows, Linux, and macOS.

Platforms:WindowsLinuxOSX

Stars1,132

Updated3 months ago

LicenseGPL-3.0

Release2015

Genre: Real-Time Strategy

Theme: Modern Military

Active

Super Mario Galaxy 1 Decompilation

A work-in-progress decompilation of Super Mario Galaxy 1 (Petari); needs your own copy of the game.

Stars1,130

Updated1 month ago

LicenseCC0-1.0

Release2019

Genre: —

Theme: —

Active

Sonic 2 (original game, not this project)

Original game image

RSDKv4-Decompilation

Clone of Sonic 2

A Retro Engine v4 decompilation of Sonic 1 & 2 (2013), adding online multiplayer and mod support.

Platforms:WindowsLinuxAndroid

Stars1,127

Updated2 months ago

LicenseUnknown

Release2020

Genre: Platform

Theme: —

Active

Unvanquished

Clone of Gloom (Quake)

An open-source arena shooter blending FPS combat with RTS base-building, inspired by mods like Natural Selection.

Platforms:WindowsLinuxOSX

Stars1,125

Updated3 months ago

LicenseUnknown

Release2011

Genre: FPS

Theme: Sci-Fi

Active

YARG (Yet Another Rhythm Game)

Clone of Guitar Hero

A free, open-source rhythm game supporting guitar, drums, vocals, and pro-guitar, using no pirated assets.

Platforms:WindowsLinuxOSX

Stars1,123

Updated1 month ago

LicenseLGPL-3.0

Release2022

Genre: Rhythm

Theme: —

Sporadic

SimCity (original game, not this project)

Original game image

Micropolis

Clone of SimCity

The GPL source release of Micropolis, the open-source SimCity, kept for historical versions of the code.

Platforms:WindowsLinuxOSX

Stars1,103

Updated9 months ago

LicenseUnknown

Release2015

Genre: Simulation

Theme: Management

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