Grand Theft Auto IV includes online multiplayer, with 15 modes of play available. The multiplayer supports up to 16 players (32 players in the PC version) and allows players to explore the entire city. Hosts of the games can control many variables, such as police presence, traffic, and weapons. The online games are split into ranked and unranked matches. The reward for the ranked gameplay is cash, which determines players' ranks.
There are several different game modes available. Team based gameplay modes include. Team Deathmatch, where 2-8 teams compete to accumulate the most kills in a traditional deathmatch; Team Mafiya Work, in which 2â€“8 teams compete to complete contract work for the "mafiya", such as escorting/killing targets or stealing cars; Team Car Jack City where 2â€“8 teams compete to steal cars and earn money for keeping them undamaged; Cops n' Crooks, featuring a team of cops who must compete against a team of crooks (which features the "All for One" variation - requiring the cops to kill the crooks' "Boss" before he is escorted to the extraction point - and the "One for All" variation - requiring the cops to kill all of the crooks before they reach the extraction point); and Turf War, involving two teams who compete to take control of designated areas of the map and control them for as long as possible.