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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Halted

Ascii Patrol

Clone of Moon Patrol

A C++ recreation of the arcade game Moon Patrol rendered entirely in ASCII art, playable though development has halted.

Platforms:WebWindowsLinux

Stars263

Updated2 years ago

LicenseGPL-3.0

Release2017

Genre: Shooter

Theme: —

Halted

No preview

CivOne

Clone of Civilization

CivOne is a project related to the original Civilization game, but its README gives no further detail on its scope or features.

Platforms:None

Stars262

Updated5 years ago

LicenseCC0-1.0

Release2015

Genre: Turn-Based Strategy

Theme: —

Active

No preview

OpenDominion

Clone of Dominion

A playable open-source browser remake of Dominion, the defunct text-based fantasy war game from Kamikaze Games.

Platforms:Web

Stars262

Updated12 days ago

LicenseAGPL-3.0

Release2015

Genre: Turn-Based Strategy

Theme: Fantasy

Halted

No preview

Miner Wars 2081 MOD KIT

Clone of Miner Wars 2081

Keen Software House's official mod kit for Miner Wars 2081, built on the game's released source code.

Platforms:Windows

Stars260

Updated13 years ago

LicenseUnknown

Release2013

Genre: FPS

Theme: —

Active

No preview

Heretic2R

Clone of Heretic II

A reverse-engineered source port of Heretic II adding widescreen support and bugfixes, with a fully completable singleplayer campaign.

Platforms:None

Stars259

Updated1 month ago

LicenseGPL-3.0

Release2024

Genre: Action

Theme: Fantasy

Archived

No preview

glitch-GameServerJS

Clone of Glitch

The server-side JavaScript that powered Glitch's gameplay on the Rhino engine, released as CC0 public domain by Tiny Speck.

Platforms:None

Stars259

Updated6 years ago

LicenseUnknown

Release2013

Genre: MMORPG

Theme: —

Active

No preview

Sonic 3/Sonic & Knuckles Disassembly

Clone of Sonic 3

A byte-perfect disassembly of Sonic 3 and Sonic & Knuckles for the Sega Genesis, built for modding.

Platforms:Genesis

Stars258

Updated1 month ago

LicenseUnknown

Release2013

Genre: Platform

Theme: —

Halted

Hovertank 3D

Clone of Hovertank 3D

id Software's official 1991 source code release of Hovertank 3D, written in Borland C++ and released under the GPLv2.

Platforms:DOS

Stars257

Updated12 years ago

LicenseGPL-2.0

Release2014

Genre: FPS

Theme: —

Active

FreeRCT

Clone of RollerCoaster Tycoon

A C++17 recreation aiming to capture the look, feel, and gameplay of RollerCoaster Tycoon 1 and 2, semi-playable in-browser via WebAssembly.

Platforms:WebWindowsLinux

Stars255

Updated14 days ago

LicenseUnknown

Release2015

Genre: Simulation

Theme: Management

Halted

No preview

Magical Life

Clone of RimWorld

An early-development fantasy colony sim adding RPG elements like classes and leveling to a RimWorld-style formula, built in C#/MonoGame.

Platforms:Windows

Stars254

Updated3 years ago

LicenseMIT

Release2017

Genre: Simulation

Theme: Sci-Fi

Archived

No preview

Hyperium

Clone of Minecraft

Hyperium was a Forge-based Minecraft client mod that has since been discontinued, with maintainers pointing users to replacement mods.

Platforms:None

Stars253

Updated5 years ago

LicenseLGPL-3.0

Release2018

Genre: Action

Theme: Fantasy

Sporadic

OpenMBU

Clone of Marble Blast Ultra

A community revival of the Xbox 360 game Marble Blast Ultra for Windows, adding controller options and fan-made content.

Platforms:Windows

Stars252

Updated5 months ago

LicenseUnknown

Release2021

Genre: Platform

Theme: —

Archived

ccleste

Clone of Celeste Classic

ccleste is a portable, hand-translated C port of Celeste Classic's PICO-8 code, targeting PC and 3DS.

Platforms:Windows3DS

Stars252

Updated4 years ago

LicenseUnknown

Release2019

Genre: Platform

Theme: —

Sporadic

OpenArena

Clone of Quake 3

The OpenArena engine, a standalone ioquake3 fork with its own renderer, used by the free Quake III Arena-style shooter.

Platforms:WindowsLinuxOSX

Stars251

Updated5 months ago

LicenseGPL-2.0

Release2014

Genre: FPS

Theme: Sci-Fi

Sporadic

pokemon-tbje

Clone of Pokémon

A from-scratch, terminal-based Pokémon battle game in Java with 241 species, real battle mechanics, and an in-house AI.

Platforms:WindowsLinuxOSX

Stars251

Updated4 months ago

LicenseUnknown

Release2025

Genre: RPG

Theme: —

Halted

Prepare Carefully

Clone of RimWorld

A RimWorld mod distributed as a Harmony-patched DLL, with separate builds maintained for each RimWorld version.

Platforms:WindowsLinuxOSX

Stars249

Updated1 year ago

LicenseMIT

Release2016

Genre: Simulation

Theme: Sci-Fi

Active

No preview

Syndicate Wars Port

Clone of Syndicate Wars

A port of 1996's Syndicate Wars to modern Windows, macOS, and Linux, built from the original DOS executable.

Platforms:WindowsLinuxOSX

Stars248

Updated12 days ago

LicenseUnknown

Release2015

Genre: Real-Time Tactics

Theme: Cyberpunk

Halted

No preview

Gorillas

Clone of Gorillas

This is an iOS remake of the classic QBasic artillery game GORILLA.BAS, built using the Pearl framework and, indirectly, cocos2d-iphone.

Platforms:iOS

Stars247

Updated12 years ago

LicenseUnknown

Release2009

Genre: Arcade

Theme: —

Halted

QB64

Clone of Gorillas

An open-source, modern BASIC compiler and IDE keeping QBasic/QB4.5 compatibility for classics like Gorillas and Nibbles.

Platforms:WindowsLinuxOSX

Stars246

Updated2 years ago

LicenseUnknown

Release2022

Genre: Arcade

Theme: —

Halted

No preview

undertale

Clone of Undertale

A shared dump of source code the uploader says may be decompiled Undertale, received from a third party (not from Toby Fox).

Platforms:None

Stars244

Updated7 years ago

LicenseUnknown

Release2019

Genre: RPG

Theme: Comedy

Archived

1010! Klooni

Clone of 1010

1010! Klooni is an open-source, libGDX-based fan clone of 1010!, available for desktop and Android, but no longer actively maintained.

Platforms:Android

Stars243

Updated7 months ago

LicenseGPL-3.0

Release2017

Genre: Puzzle

Theme: Abstract

Active

No preview

Sly Cooper and the Thievius Raccoonus

Clone of Sly Cooper and the Thievius Raccoonus

A work-in-progress, function-matching decompilation of the PS2 game Sly Cooper and the Thievius Raccoonus.

Platforms:PS2

Stars243

Updated19 days ago

LicenseCC0-1.0

Release2021

Genre: Platform

Theme: —

Halted

No preview

smb3

Clone of Super Mario Bros. 3

A byte-for-byte disassembly of Super Mario Bros. 3 that reassembles into the original NES ROM via NESASM.

Platforms:NES

Stars243

Updated1 year ago

LicenseUnknown

Release2017

Genre: Platform

Theme: —

Halted

2006scape

Clone of RuneScape

2006Scape is an actively developed, open-source Java emulation server and client for the 2006-era version of RuneScape.

Platforms:WebWindowsLinux

Stars241

Updated1 year ago

LicenseGPL-3.0

Release2019

Genre: MMORPG

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.

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