Not sure what Singularity is all about? This trailer for its multiplayer - now there's an irony - should clue you in. For starters, it's got projectile-vomiting, time-traveling zombies, a real one-up of that conventional foe.

That bug that possesses you and makes you shoot your teammates looks like a barrel of fun. Looks like you also get some time-manipulation, teleportation, and healing-ray capabilities.

Singularity, from Raven Software, is due out on Tuesday.

[Thanks to egnaro for the tip]