Originally posted by xR4G3x
wen u say go into multiplayer back out to splitscreen back out then multiplayer again.. do u mean go all the way into multiplayer were i have the option to go online,back out then go all the way into splitscreen were i have the option to start match,back out again then go all the way back into multiplayer and then i will have all challenges unlocked?
He means, go into "Multiplayer" Mode from the Main Menu, then select Play Online. Wait for your stats and everything to load, then back out of "Play Online" and select "Split-Screen." Then back out of Split-Screen and go back to "Play Online."