Free & Open Source Clones & Decompilations of Retro Games

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

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

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

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

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

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

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

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

Sega's answer to Mario — its physics and level format have been painstakingly reverse-engineered by fan projects for decades.

8 clones to play