OpenSourceGames

Giving evolution a little bit more visual flair, Thrive is a scientific open source sim about surviving and growing as a tiny creature. A new release has arrived bringing with it some pretty big changes to how it looks, along with even more customization of your run.

What is it? You take control of an organism on an alien planet, starting off in the microbe stage. The game world and other creatures all evolve and change as you do. It's all quite science-focused too, although not too overloading. It's seriously cool.

Boxcars is a free and open source application for playing backgammon online and offline.

Steam page: https://store.steampowered.com/app/3182230/Boxcars/

Source code: https://codeberg.org/tslocum/boxcars

Website: https://bgammon.org/

We are also using it to test the new PeerTube instance of f-hub.org

https://pr0game.com/

Classic version of the now P2W cult browser game OGame. They are starting a new universe in November (teaser trailer https://m.youtube.com/watch?v=QfSfS2yxqJ4 ) Code is at https://codeberg.org/pr0game/pr0game

VCMI / HoMM3

OpenGothic / Gothic 1 and Gothic 2

OpenWM / Morrowind

OpenMohaa / Medal of Honor

Also Quake 1,2,3 and probably some more.