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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ktes2

Clone of Sonic 2

ktes2 is a disassembly-based project built on Sonic the Hedgehog 2 for Sega Genesis, for informational and educational use only.

Platforms:Genesis

Stars15

Updated13 years ago

LicenseUnknown

Release2013

Genre: Platform

Theme: —

Sporadic

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re-Sonic06Demo

Clone of Sonic '06

A recompiled, playable-start-to-finish rebuild of the Sonic '06 tech demo using the ReXGlue SDK.

Platforms:Windows

Stars15

Updated7 months ago

LicenseUnknown

Release2026

Genre: Action

Theme: —

Archived

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robotron-7800

Clone of Robotron: 2084

Platforms:Atari

Stars15

Updated11 years ago

LicenseUnknown

Release2015

Genre: Arcade

Theme: —

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smb2j-disassembly

Clone of Super Mario Bros.: The Lost Levels

A disassembly of Super Mario Bros. 2 Japan (The Lost Levels), adapted here to build with the CC65 assembler.

Platforms:NES

Stars15

Updated1 year ago

LicenseUnknown

Release2021

Genre: Action

Theme: —

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utkencode

Clone of Beasts and Bumpkins

Open source encoder/decoder tools for EA's MicroTalk speech codec, used in games like SimCity 4 and The Sims Online.

Platforms:None

Stars15

Updated8 years ago

LicenseUnlicense

Release2015

Genre: Real-Time Strategy

Theme: Comedy

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Army Men 1998 Source Code and Tools

Clone of Army Men

Preserves the original 1998 Army Men source code and dev tools from The 3DO Company, including level, scenario, and animation editors.

Platforms:Windows

Stars14

Updated1 year ago

LicenseCC0-1.0

Release2022

Genre: Real-Time Tactics

Theme: Modern Military

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BioMenace decompilation

Clone of Bio Menace

A work-in-progress decompilation of Bio Menace, matching the original episode 1 executable byte-for-byte; episodes 2-3 aren't done.

Platforms:DOS

Stars14

Updated1 year ago

LicenseGPL-2.0

Release2024

Genre: Platform

Theme: —

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Friking Shark

Clone of Flying Shark

Friking Shark runs on a custom engine with dedicated Scenario, Formation, and Entity editors, built for Linux via CMake and OpenGL.

Platforms:Linux

Stars14

Updated7 years ago

LicenseUnknown

Release2015

Genre: Shmup

Theme: —

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Icebreaker 2

Clone of Icebreaker 2

Official 2007 source code release of Icebreaker 2, a 3DO strategy/action game by Andrew Looney, licensed under the GPLv3.

Platforms:3DO

Stars14

Updated3 years ago

LicenseGPL-3.0

Release2023

Genre: Puzzle

Theme: —

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Jet Lee

Clone of Bruce Lee

A remake of the platformer Bruce Lee with three playable characters and configurable difficulty, built with SDL2 for Windows and Linux.

Platforms:WindowsLinux

Stars14

Updated3 years ago

LicenseUnknown

Release2015

Genre: Action

Theme: —

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Kiloblaster (SDL)

Clone of Kiloblaster

A Linux/SDL port of Kiloblaster that reproduces its music via a bundled DOSBox OPL synth emulator and libgamemusic.

Platforms:Linux

Stars14

Updated14 years ago

LicenseUnknown

Release2012

Genre: Shooter

Theme: Sci-Fi

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ReQbert

Clone of Q*bert

ReQbert is a browser-based HTML5/JavaScript remake of the MSX version of Q*bert, made in memory of co-creator Luciano Sother.

Platforms:Web

Stars14

Updated3 years ago

LicenseGPL-3.0

Release2011

Genre: Arcade

Theme: —

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Spacewar

Clone of Spacewar!

A browser-playable, four-player remake of 1962's Spacewar!, first written in Python in 2004.

Platforms:Web

Stars14

Updated10 years ago

LicenseUnknown

Release2011

Genre: Action

Theme: Sci-Fi

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Supercars III

Clone of Super Cars

A feature-rich fan remake of Super Cars and Super Cars II with enhanced graphics, a circuit editor, and 2-player support.

Platforms:WindowsLinux

Stars14

Updated6 years ago

LicenseUnknown

Release2020

Genre: Racing

Theme: —

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TclRobots

Clone of CROBOTS

A Tcl-scripted twist on Crobots: write a program in Tcl to pilot a combat robot to victory.

Platforms:None

Stars14

Updated15 years ago

LicenseUnknown

Release2010

Genre: Strategy

Theme: —

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The Kartering

Clone of Mario Kart

A kart-racing game controlled entirely by networked clients rather than direct human input, written in C with SDL2.

Platforms:WindowsLinux

Stars14

Updated3 years ago

LicenseUnknown

Release2014

Genre: Racing

Theme: —

Sporadic

Tyrian Remake

Clone of Tyrian

A Java shoot-'em-up remake of 1995's Tyrian that keeps the original Epic Megagames assets, built on the LionEngine.

Platforms:WebWindowsLinux

Stars14

Updated9 months ago

LicenseGPL-3.0

Release2013

Genre: Shmup

Theme: Sci-Fi

Halted

UnityPacmania

Clone of Pac-Mania

A near-complete Unity and C# clone of the 1987 arcade game Pac-Mania, including all levels, cut-scenes and menus.

Platforms:Windows

Stars14

Updated2 years ago

LicenseUnknown

Release2021

Genre: Arcade

Theme: —

Halted

Warcraft 2000: Nuclear Epidemic

Clone of Warcraft 2000

Official released source code for Warcraft 2000: Nuclear Epidemic, GSC Game World's 1998 RTS built to rival Warcraft II and StarCraft.

Platforms:Windows

Stars14

Updated3 years ago

LicenseUnknown

Release2023

Genre: Real-Time Strategy

Theme: Fantasy

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crystalisdisassembly

Clone of Crystalis

A reassemblable disassembly of the NES game Crystalis for ca65, about 92% complete on PRG-ROM and 88% on CHR-ROM, free to use uncredited.

Platforms:NES

Stars14

Updated7 years ago

LicenseUnknown

Release2019

Genre: RPG

Theme: Fantasy

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earth-shaker

Clone of Earth Shaker

earth-shaker is a Unity3D remake of the ZX Spectrum game Earth Shaker, and was the author's first Unity project.

Platforms:WindowsLinuxOSX

Stars14

Updated10 years ago

LicenseUnknown

Release2016

Genre: Puzzle

Theme: —

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polanie-src

Clone of Polanie

Unmodified 1996 source code for the Polish RTS game Polanie, untested and unlikely to compile as-is.

Platforms:WindowsDOS

Stars14

Updated6 years ago

LicenseUnknown

Release2019

Genre: Real-Time Strategy

Theme: Fantasy

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pq2

Clone of Progress Quest

A cross-platform remake of the idle parody game Progress Quest, with complete Qt and terminal (NCurses) interfaces.

Platforms:Linux

Stars14

Updated1 year ago

LicenseGPL-3.0

Release2016

Genre: MMORPG

Theme: Comedy

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shiren

Clone of Mystery Dungeon: Shiren the Wanderer

A disassembly of the SNES roguelike Fushigi no Dungeon 2: Fuurai no Shiren, built with the wla-dx assembler.

Platforms:SNES

Stars14

Updated3 years ago

LicenseUnknown

Release2022

Genre: RPG

Theme: Fantasy

People are curious about clones of...

Games you know, and the open-source projects that recreate them.

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Minecraft

2009Action

The block-building sandbox that reshaped an entire genre — open-source clones range from full Java reimplementations to engines built from scratch.

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Doom

1993FPS

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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.

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Super Mario

1985Platform

The NES platformer that made side-scrolling mainstream — open-source engines recreate its physics and level format down to the pixel.

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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.

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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