Tom Sparks and the Quakes of Ruin is a great looking 3D diesel-punk action-adventure game full of crazy weapons, exciting combat and exploration of mysterious underground worlds.
I recently wrote about Esenthel and it seems they are now moving to better align themselves with engines like CryEngine and Unreal Engine with subscriptions.
Leszek Godlewski the master-mind behind the Deadfall Adventure and Painkiller: Hell & Damnation Linux ports has made a post that should help people building their games for Linux.
Shipwrecked. Captured. Betrayed. Forced to perform for an audience of cats? Yes, all that and more when you unlock BattleBlock Theater! This game just sounds funny!
KeeperRL is a Dungeon Keeper and Dwarf Fortress inspired dungeon simulator built on top of roguelike mechanics. You become a Sauron-like character, searching for ultimate knowledge of destruction.
Skyward Collapse is a pretty interesting looking god-game from Arcen Games who have become Linux-friendly developers recently, they have stated Skyward Collapse will come to Linux.
You have ~20 days to vote for your favourite project of the month for May. The projects are open source engines for commercial games/commercial content.
A mature, story-oriented adventure game with a unique style. Currently seeking funds on Kickstarter. They've just announced Linux support as standard, rather than as a stretch goal as originally planned.