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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Stardust rebuilt

Clone of Star Dust

A reverse-engineered ZX Spectrum source reconstruction of the 1987 game Stardust, made by its original developers.

Platforms:ZX Spectrum

Stars55

Updated8 years ago

LicenseUnknown

Release2017

Genre: Shmup

Theme: Sci-Fi

Active

The Sentinel on the BBC Micro

Clone of The Sentinel

A line-by-line disassembly of Geoff Crammond's 1986 game The Sentinel that rebuilds into the exact original binary.

Platforms:BBC Micro

Stars55

Updated25 days ago

LicenseUnknown

Release2025

Genre: Puzzle

Theme: Fantasy

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linerider-advanced

Clone of Line Rider

An open-source spiritual successor to Line Rider 6.2, keeping its physics compatible while adding new features, built as a C#/.NET app.

Platforms:WindowsLinuxOSX

Stars55

Updated5 years ago

LicenseGPL-3.0

Release2017

Genre: Sports

Theme: —

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play-2048

Clone of 2048

A terminal-based Rust implementation of 2048 with an optional AI that plays using the expectiminimax algorithm.

Platforms:None

Stars55

Updated3 years ago

LicenseUnknown

Release2019

Genre: Puzzle

Theme: —

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Cubic Server

Clone of Minecraft

A C++ implementation of the Minecraft server protocol targeting 1.19.3, an early-stage school project not yet recommended for general use.

Platforms:Linux

Stars54

Updated1 year ago

LicenseGPL-3.0

Release2022

Genre: Action

Theme: Fantasy

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Exolon

Clone of Exolon

An HTML5 remake of the 1987 ZX Spectrum game Exolon, built with the melonJS engine and playable in a browser.

Platforms:Web

Stars54

Updated4 years ago

LicenseMIT

Release2012

Genre: Shmup

Theme: —

Active

FPC Atomic

Clone of Atomic Bomberman

A from-scratch Free Pascal reimplementation of Atomic Bomberman's engine, with working multiplayer but no single-player mode yet.

Platforms:WindowsLinux

Stars54

Updated25 days ago

LicenseUnknown

Release2023

Genre: Action

Theme: —

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Heretic

Clone of Heretic

Raven Software's official release of the Heretic source code, published for learning and modification; the DMX sound library is excluded.

Platforms:DOS

Stars54

Updated13 years ago

LicenseGPL-2.0

Release2013

Genre: FPS

Theme: Fantasy

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Rampage

Clone of Rampage

The original 1987 Commodore 64 conversion of Bally Midway's arcade game Rampage, released by its own developer.

Platforms:C64

Stars54

Updated1 year ago

LicenseUnknown

Release2019

Genre: Arcade

Theme: —

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engge2

Clone of Thimbleweed Park

An open-source reimplementation of Thimbleweed Park's engine, rewritten from scratch in Nim, still in active development.

Platforms:WindowsLinuxOSX

Stars54

Updated2 years ago

LicenseUnknown

Release2022

Genre: Adventure

Theme: Comedy

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mechcommander2

Clone of MechCommander 2

A patched version of MechCommander 2's Microsoft-released source code, though the README doesn't detail what the patches change.

Platforms:Windows

Stars54

Updated3 years ago

LicenseBSD-2-Clause

Release2014

Genre: Real-Time Tactics

Theme: Sci-Fi

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Altered-Beast

Clone of Altered Beast

Released C64 source code for Altered Beast, credited to Michael J Archer, following his earlier Alien 3 source code release.

Platforms:C64

Stars53

Updated7 years ago

LicenseUnknown

Release2019

Genre: Action

Theme: —

Active

Prince-Monogame

Clone of Prince of Persia 2

A C#/MonoGame reimplementation of Prince of Persia 2: The Shadow and the Flame, for Windows and Linux.

Platforms:WindowsLinux

Stars53

Updated1 month ago

LicenseGPL-2.0

Release2015

Genre: Platform

Theme: —

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Airline Tycoon

Clone of Airline Tycoon

Completes the partial Airline Tycoon Deluxe source code GOG bundled as a bonus; the singleplayer game is fully playable.

Platforms:Windows

Stars52

Updated3 years ago

LicenseUnknown

Release2019

Genre: Simulation

Theme: —

Active

BBC Micro disc Elite

Clone of Elite

Source code for the disc version of Elite on the BBC Micro, reconstructed from a disassembly and documented line-by-line by Mark Moxon.

Platforms:BBC Micro

Stars52

Updated13 days ago

LicenseUnknown

Release2021

Genre: Action

Theme: Sci-Fi

Archived

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Macintosh Wolfenstein 3D Source Code

Clone of Wolfenstein 3D

The original 1994 Wolfenstein 3D source code for classic Mac OS, released by Interplay Productions under license from id Software.

Platforms:Classic Mac OS

Stars52

Updated12 years ago

LicenseUnknown

Release2013

Genre: FPS

Theme: —

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RSDKv2 Decompilation

Clone of Sonic Nexus

A full decompilation of the Retro-Sonic Engine v2 used to build the fan game Sonic Nexus.

Platforms:WindowsLinuxOSX

Stars52

Updated2 months ago

LicenseUnknown

Release2021

Genre: Action

Theme: —

Archived

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SimUnity2

Clone of The Sims 2

A discontinued Unity reimplementation of The Sims 2, with only neighborhood select/view working; succeeded by OpenTS2.

Platforms:None

Stars52

Updated4 years ago

LicenseUnknown

Release2019

Genre: Simulation

Theme: —

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shadowgrounds

Clone of Shadowgrounds: Survivor

Frozenbyte's own 2011 source release of Shadowgrounds and Shadowgrounds Survivor; original game assets required.

Platforms:None

Stars52

Updated2 years ago

LicenseUnknown

Release2011

Genre: Shooter

Theme: —

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shiromino

Clone of Tetris: The Grand Master

An open-source Tetris-like puzzle game that adds pentomino pieces alongside standard tetrominoes.

Platforms:WindowsLinux

Stars52

Updated1 year ago

LicenseUnknown

Release2020

Genre: Puzzle

Theme: Abstract

Halted

Duane Blehm's Source Code

Clone of Cairo ShootOut!

An archive of the original 1980s Macintosh source code for three Duane Blehm games, targeting Classic Mac OS.

Platforms:Classic Mac OS

Stars51

Updated10 years ago

LicenseUnknown

Release2016

Genre: Arcade

Theme: —

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Dungeon Eye

Clone of Eye of the Beholder II

An open-source remake of Eye of the Beholder II, with more information once hosted on the project's now-archived website.

Platforms:Windows

Stars51

Updated5 years ago

LicenseUnknown

Release2015

Genre: RPG

Theme: Fantasy

Sporadic

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Encounter

Clone of Encounter!

A from-scratch WebGL remake of the Commodore 64 game Encounter, playable in the browser with keyboard or touchscreen controls.

Platforms:Web

Stars51

Updated7 months ago

LicenseUnknown

Release2012

Genre: Shmup

Theme: —

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FOnline

Clone of Fallout Online

A cleaned-up fork of an open-source Fallout-style multiplayer engine, fixing bugs and adding Linux support; currently unplayable.

Platforms:WindowsLinux

Stars51

Updated4 years ago

LicenseGPL-3.0

Release2013

Genre: MMORPG

Theme: —

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