http://www.youtube.com/watch?v=YcMvYTHbdFM
If you played this game when it first came out here is some of the new content they've released
+ Co-op vs AI (You and three other players)
+ Daily Missions
+ PVP match making
+ New Maps
+ New Guns
+ A Class System
+ Clan Battles
If you haven't played the video above is a review of the game which is a turn based tactics rpg like X-COM, Jagged Alliance, and Fall out
