bungie if your are reading this please listen to what i am saying. please put online matchmaking for the campaign (not just friends only) and every game mode that is online. odst is a great game but all of the people on my friends list got all of the achievements and then they ended up trading thie game in at gamestop because the replay value is nonexistiant. i still want to play firefight and campaign online but cant because none of my friends have the game anymore. thank you for listening