Introversion's new game is coming out soon.I'm not sure when they announced it or when they started showing the details of the game, I can't say I pay attention to their site or steam that much, although I am a huge fan of their games (Especially Defcon and Uplink).
I never got the full version of darwinia but the demo was somewhat fun. I think this looks a lot more fun, though. It's essentially a multiplayer version of Darwinia that has 5 Game modes: Blitzkrieg, which is basically like control point maps in TF2, Rocket Riot, which looks a bit like territory control (only with all territories simeltaneously) maps with Darwinia's solar panel+fuel pump+rocket aspect, Capture the statue, which looks like CTF with a single, giant flag, and King of the Hill and Domination which are basically exatcly like they are in other maps.