Players can play alone or with friends against AI opponents in "Combat Training" with a separate progression system.[14] Online split-screen is re-introduced on Xbox 360 and PS3. The guest account can rank up but is reset after each sign out. Only on Xbox 360, a second Gold Xbox Live account can be used to keep the second player's progression.[15] Aside from the Combat Training mode, Xbox users can also have up to four players in split-screen mode play against AI opponents even without having an Xbox Live account. This is done by configuring the Local Split Screen settings and setting the number of enemies to a value greater than zero.[16]