

Beside the already mentioned Open Source Game Clones there’s also this list on GitHub.
As for specific titles, I’d like to add:
- Fallout Community Edition and Fallout 2 Community Edition
- VCMI (open-source engine for Heroes of Might and Magic III)
- OpenGOAL (port of Jax and Daxter, second and third game in development)
- OpenGothic (officially only supports Gothic 2 but works with the first game as well)
- Perfect Dark port
- Super Mario 64 Port
- TRX – Tomb Raider I & II: Community Edition
There’s also WipeOut Phantom Edition but this one isn’t open-source so I’ll just leave it here in case someone wants to check out the existing build.
Yeah, I’ve seen it after writing this. Thankfully, half of these are for PC native games so I didn’t miss completely at least.