Free & Open Source Clones & Remakes of Retro Games

3,241 open-source clones and remakes of 1,919 retro games — real source code you can read, fork, and play today, not just a free download.

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BlakedAwesomenaughts

Clone of Awesomenauts

An unmodified melonJS HTML5 game engine boilerplate template with no game-specific code built on top, marked as unplayable.

Platforms:Web

Stars20

Updated11 years ago

LicenseMIT

Release2015

Genre: RPG

Theme: —

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Chocolate Blood

Clone of Blood

Platforms:None

Stars20

Updated1 year ago

LicenseUnknown

Release2025

Genre: FPS

Theme: —

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Chocolate DOOM-3-BFG

Clone of Doom 3

A source port reproducing vanilla Doom 3: BFG Edition on the modernized BFG engine, forked from RBDOOM-3-BFG before shadow mapping.

Platforms:WindowsLinux

Stars20

Updated1 month ago

LicenseGPL-3.0

Release2025

Genre: FPS

Theme: Sci-Fi

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Dr. Mario (NES) Disassembly

Clone of Dr. Mario

A full disassembly of the NES version of Dr. Mario that reassembles into the original Rev A ROM using the ASM6f assembler.

Platforms:NES

Stars20

Updated4 years ago

LicenseUnknown

Release2021

Genre: Puzzle

Theme: —

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MacWolfSDL

Clone of Wolfenstein 3D

A modern SDL3 source port of the Macintosh version of Wolfenstein 3D for Windows, Linux, and macOS, supporting custom scenario packs.

Platforms:WindowsLinuxOSX

Stars20

Updated1 year ago

LicenseUnknown

Release2025

Genre: FPS

Theme: —

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Mega Man 6 (NES) Disassembly

Clone of Mega Man 6

A complete disassembly of the NTSC-U Mega Man 6 NES ROM that reassembles byte-for-byte, though not all code is documented yet.

Platforms:NES

Stars20

Updated5 years ago

LicenseUnknown

Release2017

Genre: Platform

Theme: Sci-Fi

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SLF_SOURCE

Clone of Super Lemonade Factory

Official open-source release of the iOS version of Super Lemonade Factory, built on the Flixel-iOS engine.

Platforms:iOS

Stars20

Updated14 years ago

LicenseUnknown

Release2012

Genre: Puzzle

Theme: —

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SOS1937

Clone of Spirit of Speed 1937

Official source code for Spirit of Speed 1937, targeting Dreamcast hardware; currently inactive but playable.

Platforms:Dreamcast

Stars20

Updated3 years ago

LicenseUnknown

Release2022

Genre: Racing

Theme: —

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Space Harrier Clone

Clone of Space Harrier

A tribute to Sega's 1985 arcade game Space Harrier, built with SDL2, recreating the first level and its snake-dragon boss fight.

Platforms:Windows

Stars20

Updated8 years ago

LicenseMIT

Release2018

Genre: TPS

Theme: Sci-Fi

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Star Trek 1971 for Python

Clone of Star Trek

A Python port of a C# rewrite of the original 1971 text-based Star Trek game.

Platforms:None

Stars20

Updated3 years ago

LicenseMIT

Release2014

Genre: Simulation

Theme: Sci-Fi

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SwtPacMan

Clone of Pac-Man

A Java Pac-Man clone by Michael Fogleman built with the SWT graphics toolkit.

Platforms:Windows

Stars20

Updated6 years ago

LicenseUnknown

Release2016

Genre: Arcade

Theme: —

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XorCurses

Clone of XOR

An ASCII terminal clone of the 1987 puzzle game XOR, built in C with ncurses for Linux.

Platforms:Linux

Stars20

Updated3 years ago

LicenseGPL-3.0

Release2011

Genre: Puzzle

Theme: —

Sporadic

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jy-remake

Clone of Heroes of Jin Yong

A community remake of Heroes of Jin Yong, built on code originally written by a contributor known as "the swimming fish" and extended since.

Platforms:None

Stars20

Updated6 months ago

LicenseUnknown

Release2016

Genre: RPG

Theme: Fantasy

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narc

Clone of NARC

The source code of Williams Electronics' 1988 arcade game NARC, preserved in the historicalsource repository.

Platforms:Arcade

Stars20

Updated5 years ago

LicenseUnknown

Release2021

Genre: Shooter

Theme: —

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wkbre

Clone of Warrior Kings

An engine reimplementation of Warrior Kings (Battles) for editing and building custom maps; gameplay is still in development.

Platforms:Windows

Stars20

Updated2 years ago

LicenseGPL-3.0

Release2016

Genre: Real-Time Strategy

Theme: —

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zSILENCER

Clone of Silencer

A reimplementation of the 2000 WON.net multiplayer game Silencer, built with SDL2 for Windows, macOS, and Linux.

Platforms:WindowsLinuxOSX

Stars20

Updated5 years ago

LicenseUnknown

Release2013

Genre: Action

Theme: —

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7k2

Clone of Seven Kingdoms II: The Fryhtan Wars

An experimental fork of the 7kfans GPL release of Seven Kingdoms II replacing DirectX/DirectPlay/DirectSound with SDL2, ENet, and OpenAL.

Platforms:Linux

Stars19

Updated10 years ago

LicenseUnknown

Release2012

Genre: Real-Time Strategy

Theme: Fantasy

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Amiga Cannonball-C

Clone of Out Run

An Amiga 68k port of Cannonball-C, an ANSI C conversion of the Cannonball engine, intended as a base for platforms with poor C++ support.

Platforms:Amiga

Stars19

Updated9 years ago

LicenseUnknown

Release2017

Genre: Arcade

Theme: —

Archived

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Centipede Source Code

Clone of Centipede

Platforms:Atari

Stars19

Updated11 years ago

LicenseUnknown

Release2015

Genre: Shooter

Theme: Fantasy

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Donkey-Kong-Country-2-Disassembly

Clone of Donkey Kong Country 2

A disassembly of Donkey Kong Country 2 for the SNES targeting the MD5-verified USA V1.0 ROM, built on the author's SNES ROM Framework.

Platforms:SNES

Stars19

Updated5 years ago

LicenseGPL-3.0

Release2021

Genre: Platform

Theme: —

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Ironseed

Clone of Ironseed

Platforms:DOS

Stars19

Updated13 years ago

LicenseGPL-3.0

Release2013

Genre: Simulation

Theme: Sci-Fi

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Kevin Toms Football Manager

Clone of Football Manager

The original 1982 BASIC source code for the ZX81 version of Kevin Toms's Football Manager, the series' first, text-based game.

Platforms:TRS-80

Stars19

Updated4 years ago

LicenseUnknown

Release2021

Genre: Simulation

Theme: Management

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LOZ

Clone of Legend of Zelda

A C++ remake of the original Legend of Zelda built with Allegro, plus C# tools that extract graphics and data from the original ROM.

Platforms:None

Stars19

Updated5 years ago

LicenseApache-2.0

Release2021

Genre: Action

Theme: —

Active

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OpenBreed

Clone of Alien Breed

An in-progress C# reimplementation of Team17's Alien Breed games, with an asset editor; not yet playable.

Platforms:Windows

Stars19

Updated19 days ago

LicenseUnknown

Release2018

Genre: action game

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.

41 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.

17 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

1998Action

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.

3 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.

4 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.

7 clones to play