Yeah, runs on Linux fine (my experience was running it from Steam), looks good and is defintelly a shooter.

Turns out it's not really my kind of game because it's a succession of set-pieces (a sequence of fully fledged 3D areas were player progression is mostly linear) but for those more into the shooting and less into exploring or building angles it should be good fun as it's definitely all about the shooting your way through enemy strongpoints (not really about defending from enemy waves).