Unvanquished sure is one of the prettiest open source games around isn't it? Like clockwork they have released a new alpha with a bucket-load of changes.
KeeperRL is the up-and-coming open source dungeon sim that recently hit their funding goal on indiegogo to expand. They have also just release a big alpha update to the free and open source game.
Pixel Dungeon is a traditional procedural death labyrinth game with pixel-art graphics and simple interface. Originally designed for Android the game is going to be open sourced soon, which means a port for Linux opens up!
OpenXcom is still one of my favourite open source engines ever. The original X-COM game UFO: Enemy Unknown/X-COM UFO Defense is one of the best strategy games ever made. The incredible open source engine is finally approaching a 1.0 release.
Good news open source gaming fans, KeeperRL has officially hit 100% on indiegogo which will hopefully give the developer plenty of room to improve the project.
I am sure there are plenty of Nethack fans around, Vulture is an isometric graphical interface for the roguelike engine: NetHack and it's trying to get on Steam.
The xoreos project that aims to create an open source game engine to play games made for BioWare's Aurora Engine (think Neverwinter Nights, Knight of the Old Republic) is seeking OpenGL developers.
Remember Mutant Gangland? It's the rather fun looking turn-based strategy game from BacioiuC that pits robots vs mutants. The developer has given an update on the status of the second Alpha and has put the source-code under the fully open MIT license.
After months of hard work and multiple test releases, we are proud to announce the long-awaited release of Warsow 1.5. The latest and greatest version introduces significant updates to all areas of the game.
KeeperRL is an open source dungeon simulator game inspired by Dungeon Keeper and Dwarf Fortress. It gets better all the time and this update is no different. It also needs a little push on its crowdfunding campaign to make it even better.