After reading some reviews quite an intriguing concept. Its provisionally a co-op game for 3-6 players, and together they have to defend the Galactica and meet Challenges (by offering cards).
...however at the start of the game one or more players is secretly assigned as a traitor, and it's their job to un-obtruisively screw over the co-op efforts. It reminds me a bit of Bang! (I think that's what its called) where you have a secretly assigned role to ethier kill or defend the sheriff.
Obviously I like the idea of fucking over the team :-)