According to Spain’s official PlayStation magazine, PlayStation.RevistaOficial, GTA IV will support up to 16 players online and will include 15 different game modes. There will be team and solo game types within the single player game mode maps. The ability to tweak in-game options was also revealed that include weapons selection and traffic density. Known game types include the following:
Deathmatch
Team Deathmatch
Race
GTA Race
Mafia Work
Team Mafia Work
Turf War
Cops’N Crooks
Deal Breaker
Hangman’s NOOSE
Car Jack City
Bomb da Base II
Free Mode