New Diablo (Diablo 3) will be different like before. The Diablo seen in leaked have online mode, where you can versus friend. After you download the game, you will face the login (login? this goes online?), just enter your login and you will face "heroes creation screen". In this screen we can choose
Babarian
Demon Hunter
Monk
Witch Docter
Wizard
*All 5 above I think it is a class? And next we will face heroes selection screen. in here we can view all your heroes tht create earlier.
After select your character, choose game type like Campaing and Versus. Campaign