My friend is hosting a challenge lobby for 1600 microsoft points, but the microsoft points are not for him there for his friend who is trying to get a game off the market place. he wont be on for a while so just messege me my GT is Nerk6 and when he gets on i will join and invite you also the 1600 is for the whole lobby so one person pays everyone in the lobby gets. The challenge lobby unlocks everything humanily possiable for MW2.