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

Mortal Kombat (original game, not this project)

Original game image

mk.js

Clone of Mortal Kombat

A Mortal Kombat-style browser fighting game in JavaScript, with local and network two-player modes.

Platforms:Web

Stars1,549

Updated4 years ago

LicenseUnknown

Release2013

Genre: Fighting

Theme: Fantasy

Active

M.U.G.E.N (original game, not this project)

Original game image

Ikemen-GO

Clone of M.U.G.E.N

An open-source, MIT-licensed fighting game engine in Go running M.U.G.E.N-compatible content, targeting M.U.G.E.N 1.1 Beta compatibility.

Platforms:WindowsLinuxOSX

Stars1,544

Updated1 month ago

LicenseUnknown

Release2019

Genre: Fighting

Theme: —

Halted

Star Ruler 2

Clone of Star Ruler 2

A massive-scale 4X/RTS set in space, officially open-sourced by original developer Blind Mind Studios.

Platforms:WindowsLinux

Stars1,528

Updated3 years ago

LicenseUnknown

Release2018

Genre: Real-Time Strategy

Theme: Sci-Fi

Active

Quake 3 (original game, not this project)

Original game image

Quake3e

Clone of Quake 3

A modernized Quake III Arena engine (built on ioquake3) with optional Vulkan rendering, staying compatible with existing Q3A mods.

Platforms:WindowsLinuxOSX

Stars1,521

Updated2 months ago

LicenseGPL-2.0

Release2016

Genre: FPS

Theme: Sci-Fi

Active

Skate 3 Recompilation 2

Clone of Skate 3

An unofficial native recompilation of the Xbox 360 version of Skate 3 for Windows, Linux and macOS.

Stars1,488

Updated3 months ago

LicenseUnknown

Release2026

Genre: skateboarding video game

Theme: —

Active

Animal Crossing (original game, not this project)

Original game image

Animal Crossing Port

Clone of Animal Crossing

A native PC port of Animal Crossing for GameCube, built on the ac-decomp decompilation with an OpenGL 3.3 layer.

Stars1,468

Updated3 months ago

LicenseUnknown

Release2026

Genre: Simulation

Theme: —

Sporadic

Soldat (original game, not this project)

Original game image

OpenSoldat

Clone of Soldat

The open-sourced 1.8 codebase of Soldat, the fast-paced 2D side-view multiplayer shooter, buildable on Windows, Linux and macOS.

Platforms:WindowsLinuxOSX

Stars1,465

Updated10 months ago

LicenseMIT

Release2018

Genre: Platform

Theme: Modern Military

Halted

Original game image

System Shock

Clone of System Shock

Night Dive Studios' GPL-licensed release of System Shock's 1994 classic Mac OS source code, without game data.

Platforms:Classic Mac OS

Stars1,465

Updated8 years ago

LicenseGPL-3.0

Release2018

Genre: RPG

Theme: —

Halted

Original game image

Amnesia: A Machine for Pigs

Clone of Amnesia: A Machine for Pigs

The official GPLv3-licensed engine source for Amnesia: A Machine for Pigs, needing the no-longer-available 2012 FBX SDK to build.

Platforms:WindowsLinuxOSX

Stars1,460

Updated3 years ago

LicenseGPL-3.0

Release2020

Genre: Adventure

Theme: Horror

Active

Tabletop Club

Clone of Tabletop Simulator

An open-source, physics-driven 3D tabletop sandbox built with Godot, with free online multiplayer and no sign-up.

Platforms:WindowsLinuxOSX

Stars1,456

Updated2 months ago

LicenseMIT

Release2020

Genre: simulation video game

Theme: —

Archived

OpenTomb

Clone of Tomb Raider

An inactive from-scratch Tomb Raider 1–5 engine remake with Lua scripting and support for custom TRLE levels.

Platforms:Windows

Stars1,445

Updated1 year ago

LicenseLGPL-3.0

Release2015

Genre: Platform

Theme: —

Active

OpenTESArena

Clone of The Elder Scrolls: Arena

A clean-room open-source engine for The Elder Scrolls: Arena, still missing quests, spells and saves.

Platforms:WindowsLinuxOSX

Stars1,414

Updated2 months ago

LicenseMIT

Release2016

Genre: RPG

Theme: —

Sporadic

URL Snake

Clone of Snake

A joke Snake clone that renders the entire game inside the browser's URL bar using Braille characters.

Platforms:Web

Stars1,395

Updated1 year ago

LicenseUnlicense

Release2016

Genre: Arcade

Theme: —

Active

Animal Crossing

Clone of Animal Crossing

A decompilation of the USA revision of Animal Crossing for GameCube, still in development and requiring your own disc image.

Platforms:GameCube

Stars1,386

Updated3 months ago

LicenseCC0-1.0

Release2022

Genre: Simulation

Theme: —

Active

proxx

Clone of Minesweeper

A Minesweeper-style web game from Google Chrome Labs built to run on any browser, even feature phones.

Platforms:Web

Stars1,359

Updated4 months ago

LicenseApache-2.0

Release2019

Genre: Puzzle

Theme: —

Active

REDRIVER2

Clone of Driver 2

A from-scratch reimplementation of Driver 2, decompiled from the original PS1 binary without emulation, with bugs fixed.

Platforms:WebWindowsPS

Stars1,355

Updated4 months ago

LicenseMIT

Release2020

Genre: Racing

Theme: —

Active

Freedoom

Clone of Doom

A free replacement for Doom's levels, art, sounds, and music, requiring a separate Doom source port to actually run it.

Platforms:None

Stars1,343

Updated4 months ago

LicenseUnknown

Release2012

Genre: FPS

Theme: Sci-Fi

Active

Flare

Clone of Diablo

Flare is a single-player 2D dark-fantasy action RPG built on the open-source FLARE engine, with moddable INI and Tiled-based content.

Platforms:WindowsLinuxOSX

Stars1,314

Updated3 months ago

LicenseUnknown

Release2012

Genre: RPG

Theme: Horror

Active

Original game image

Mario Kart 64

Clone of Mario Kart 64

An ongoing decompilation of Mario Kart 64, verified against USA and European ROM revisions, requiring assets from the original game.

Platforms:N64

Stars1,297

Updated2 months ago

LicenseUnknown

Release2020

Genre: Racing

Theme: —

Active

doukutsu-rs

Clone of Cave Story

A from-scratch reimplementation of the Cave Story engine with quality-of-life improvements, requiring the original game's data files.

Platforms:WindowsLinuxOSX

Stars1,289

Updated2 months ago

LicenseMIT

Release2020

Genre: Adventure

Theme: Sci-Fi

Sporadic

SDLPoP

Clone of Prince of Persia

An open-source, feature-expanded port of DOS Prince of Persia, built from a full disassembly of the original executable.

Platforms:WindowsLinuxOSX

Stars1,283

Updated10 months ago

LicenseGPL-3.0

Release2015

Genre: Platform

Theme: —

Active

SingStar (original game, not this project)

Original game image

UltraStar Deluxe

Clone of SingStar

A free, open-source karaoke game for up to six players that forks UltraStar with added party mode and Linux/macOS support.

Platforms:WindowsLinuxOSX

Stars1,267

Updated1 month ago

LicenseGPL-2.0

Release2015

Genre: Rhythm

Theme: —

Active

Double Dragon (original game, not this project)

Original game image

OpenBOR

Clone of Double Dragon

A royalty-free sprite engine for side-scrolling beat 'em ups, descended from Senile Team's Beats of Rage.

Platforms:WindowsLinuxAndroid

Stars1,251

Updated2 months ago

LicenseBSD-3-Clause

Release2017

Genre: Action

Theme: —

Active

GemRB

Clone of Baldur's Gate

GemRB is a portable, open-source reimplementation of the Infinity Engine, requiring the player's own copy of the original game data.

Platforms:WindowsLinuxOSX

Stars1,249

Updated1 month ago

LicenseGPL-2.0

Release2012

Genre: RPG

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