Rainbow 6 Seige

[GUMBY-KID]

Get this game if you like tactical teamwork.  It even has a nice AI mode (for the casual gamer) where you still are teamed up with other players to take on AI terrorists.  I've been loving the beta and will be purchasing the full game in two weeks (after my finals).  If you have AMD hardware though do some research before buying I've read about some issues with their graphics cards.