I don't know about the XBOX version of this game, but on the PS3 version, you can't do 2 player, It's only a one player game, sorry.
Hope I helped you by telling you this information.
Sorry that I let you down, but, yeah.
SophieDean'
actually once u reach a certain part in the game u will unlock it on the phone
only for xbox and go to your phone it will say 2 players
there is no GTA4 on ds, but there is gta:chinatown wars on ds, psp, and ipod which is set in the first 2 islands of gta4, but in birds eye view.
only one human player.
mafia is more popular
Just Cause 2
You don't have turn signals on GTA4 usable by the player.
there is no hovercraft in gta4
just cause 2
no, but nice try.
check them out on the garage at gta4.net.
I haven't heard much about Mafia 2 or Yaquza 2, so I would say either GTA4 or Saints Row 2. GTA4 is very good, I own it, but Saints Row 2 is sure to be a biiig hit.
this is just my opinion gta4