Some detailed information about GTA IV’s multiplayer modes has finally been released. There are a total of 15 multiplayer modes.
- Hangman’s NOOSE
- Car Jack City
- Bomb da Base
- Bomb da Base II
- Mafia Work
- Team Mafia Work
- Deathmatch
- Team Deathmatch
- Turf War
- Cops ‘n Crooks
- Race
- GTA Race
- Deal Breaker
- Free Mode
- Unknown
Check out: gta4.net/multiplayer for descriptions of most of the modes.