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

Return to Castle Wolfenstein (original game, not this project)

Original game image

Return to Castle Wolfenstein Single Player

Clone of Return to Castle Wolfenstein

Official id Software GPL source release of Return to Castle Wolfenstein's single-player code; game data isn't included.

Platforms:Windows

Stars627

Updated5 years ago

LicenseGPL-3.0

Release2012

Genre: FPS

Theme: Sci-Fi

Halted

Super Mario World (original game, not this project)

Original game image

smw

Clone of Super Mario World

A reverse-engineered reimplementation of Super Mario World, verified frame-by-frame against a reference emulator for accuracy.

Platforms:SNES

Stars622

Updated2 years ago

LicenseUnknown

Release2023

Genre: Platform

Theme: —

Archived

Duke Nukem 3D (original game, not this project)

Original game image

Chocolate Duke3D

Clone of Duke Nukem 3D

A faithful, now-archived source port of Duke Nukem 3D staying close to the original code, with added educational comments.

Platforms:WindowsLinuxOSX

Stars619

Updated7 years ago

LicenseUnknown

Release2012

Genre: FPS

Theme: —

Active

Silent Hill (original game, not this project)

Original game image

Silent Hill Port

Clone of Silent Hill

A native Windows and Linux port of Silent Hill built from its PlayStation decompilation, playable start to finish.

Stars617

Updated1 month ago

LicenseGPL-3.0

Release2026

Genre: Action

Theme: Horror

Halted

Original game image

Wolfenstein: Enemy Territory

Clone of Wolfenstein: Enemy Territory

id Software's GPL release of Wolfenstein: Enemy Territory, the free multiplayer FPS spun off from Return to Castle Wolfenstein.

Platforms:WindowsLinux

Stars613

Updated14 years ago

LicenseGPL-3.0

Release2012

Genre: FPS

Theme: World War II

Active

Minecraft: Nintendo Switch Edition Decompilation

Clone of Minecraft: Nintendo Switch Edition

A work-in-progress decompilation of Minecraft: Nintendo Switch Edition v1.0.17, with no game assets included.

Stars611

Updated1 month ago

LicenseUnknown

Release2024

Genre: —

Theme: —

Active

Portal (original game, not this project)

Original game image

Portal 64: Still Alive

Clone of Portal

A fan-made N64 demake of Valve's Portal, requiring your own legally owned copy of the original game's files.

Platforms:N64

Stars611

Updated2 months ago

LicenseMIT

Release2023

Genre: FPS

Theme: —

Active

Librelancer

Clone of Freelancer

A C# and OpenGL reimplementation of Freelancer for Windows and Linux, requiring an existing Freelancer installation to run.

Platforms:WindowsLinux

Stars609

Updated1 month ago

LicenseUnknown

Release2015

Genre: Action

Theme: Sci-Fi

Active

Mario Kart 64 (original game, not this project)

Original game image

MarioKart 64 Recompilation

Clone of Mario Kart 64

A native static recompilation of MarioKart 64 with widescreen, high framerate and mod support; needs your own US ROM.

Stars603

Updated3 months ago

LicenseGPL-3.0

Release2025

Genre: Racing

Theme: —

Active

Open Fodder

Clone of Cannon Fodder

An open-source Cannon Fodder engine for modern systems, running the retail games or magazine demos, with scripted random maps.

Platforms:WebWindows

Stars603

Updated2 months ago

LicenseGPL-3.0

Release2012

Genre: Action

Theme: —

Halted

OpenD2

Clone of Diablo II

An early-stage open-source rewrite of the Diablo II engine that runs on the original game files, aimed at easier modding.

Platforms:WindowsLinux

Stars602

Updated5 years ago

LicenseGPL-3.0

Release2017

Genre: RPG

Theme: Fantasy

Active

Bloodborne (original game, not this project)

Original game image

Bloodborne Recompilation

Clone of Bloodborne

A native Linux port that runs Bloodborne's PS4 executable with a Vulkan renderer and FSR upscaling.

Stars598

Updated1 month ago

LicenseGPL-2.0

Release2026

Genre: RPG

Theme: Fantasy

Active

No preview

BitCraft MMORPG Open Source Server Code

Clone of BitCraft

The open-source server-side code for BitCraft, a community sandbox MMORPG, built as a SpacetimeDB module.

Stars597

Updated1 month ago

LicenseApache-2.0

Release2026

Genre: —

Theme: —

Active

pacman.c

Clone of Pac-Man

A minimal-dependency Pac-Man clone in C99 for Windows, macOS, Linux and the browser.

Platforms:WebWindowsLinux

Stars593

Updated4 months ago

LicenseMIT

Release2020

Genre: Arcade

Theme: —

Active

OpenApoc

Clone of X-COM: Apocalypse

An alpha reimplementation of X-COM: Apocalypse with modding, a skirmish mode and modern resolutions; it needs the original files.

Platforms:WindowsLinuxOSX

Stars592

Updated1 month ago

LicenseGPL-3.0

Release2014

Genre: Strategy

Theme: Horror

Halted

OpenSkyscraper

Clone of SimTower

An unfinished, unplayable open-source C++ remake of SimTower that needs the original game's SIMTOWER.EXE to run.

Platforms:WindowsLinuxOSX

Stars591

Updated7 years ago

LicenseGPL-2.0

Release2010

Genre: Simulation

Theme: Management

Halted

beijing_fushengji

Clone of 北京浮生记

The official source code (version 1.2.2) for Beijing Fushengji, originally compiled with Visual C++ 6.0 on Windows XP.

Platforms:Windows

Stars590

Updated6 years ago

LicenseGPL-2.0

Release2012

Genre: RPG

Theme: —

Active

Pokémon Gold and Silver (original game, not this project)

Original game image

Pokémon HeartGold and SoulSilver

Clone of Pokémon Gold and Silver

A work-in-progress, not-yet-playable disassembly of Pokémon HeartGold and SoulSilver.

Platforms:DS

Stars589

Updated2 months ago

LicenseUnknown

Release2021

Genre: RPG

Theme: —

Active

Return to the Roots

Clone of The Settlers II

A community-maintained reimplementation of The Settlers II adding internet multiplayer, reusing the original's graphics and sound.

Platforms:WindowsLinuxOSX

Stars588

Updated2 months ago

LicenseGPL-2.0

Release2013

Genre: Real-Time Strategy

Theme: Medieval

Sporadic

RPG Maker (original game, not this project)

Original game image

mkxp

Clone of RPG Maker

An open-source RGSS runtime for running RPG Maker XP, VX and VX Ace games natively, especially on Linux.

Platforms:WindowsLinuxOSX

Stars587

Updated9 months ago

LicenseGPL-2.0

Release2013

Genre: RPG

Theme: —

Archived

SpongeBob SquarePants: SuperSponge (original game, not this project)

Original game image

SBSPSS

Clone of SpongeBob SquarePants: SuperSponge

The preserved full source-code history of the 2001 PS1 platformer SpongeBob SquarePants: SuperSponge, by Climax Studios.

Platforms:PS

Stars583

Updated6 years ago

LicenseUnknown

Release2018

Genre: Adventure

Theme: —

Active

Jazz Jackrabbit 2 Engine Reimplementation

Clone of Jazz Jackrabbit 2

An open-source reimplementation of Jazz Jackrabbit 2 that runs using your original game files.

Stars575

Updated2 months ago

LicenseGPL-3.0

Release2017

Genre: Platform

Theme: —

Active

OpenTyrian

Clone of Tyrian

An open-source port of the DOS shooter Tyrian that includes the freeware game data and supports networked play.

Platforms:Windows

Stars572

Updated1 month ago

LicenseGPL-2.0

Release2020

Genre: Shmup

Theme: Sci-Fi

Active

Helion

Clone of Doom

A performance-focused, from-scratch Doom source port using static rendering to run complex modern maps well on any hardware.

Platforms:WindowsLinux

Stars570

Updated1 month ago

LicenseGPL-3.0

Release2019

Genre: FPS

Theme: Sci-Fi

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