When I rented this game I thought I could use it for online play. You have to have a passcode in order to play it online. You get the passcode, when the game is brand new. Therefore I couldn't play online. You guys should really send the passcodes for these kind of games with the game.. Not very satisfied with this, really makes me wonder what other games are going to need this when I rent them..
If you love the single player the you'll love the online portion. The only flaw in the online play, is the map editor. You can add vehicles or ai but you can't put it online if you do. This ruins the map creation for people who love to create maps. Other then that its amazing.