Kadangi šis GTA IV yra Online, jame istorijos beveik nebus (galima žaisti ir SinglePlayer, tada bus labai įtraukianti istorija). Žaidime galima rinktis iš kelių skirtingų žaidimo režimų, kaip Deathmatch, Race, Free Mode ir pan. MultiPlayer yra visas Liberty miestas, todėl vietos tikrai užteks, o su draugais galima sugalvoti įvairiausių užsiėmimų didžiajame Liberty mieste. Tikriausiai daug kas jau seniai svajojo, kaip būtų puiku su draugais GTA mieste pasivažinėti, pakvailioti ar kokį policininką nugalabyti, sulipti į vieną automobilį ir lėkti maksimaliu greičiu pilnomis automobilių ir pėsčiųjų gatvėmis...
GTA IV ir su SinglePlayer yra tiesiog nuostabus, o MultiPlayer jį padaro dar kelis kartus nuostabesnį. Nėra ką daug pasakoti, reikia pačiam išbandyti ir pajausti, ką reiškia didelis laisvas pasaulis, kai jame yra galingi automobiliai, krūva ginklų ir keletas draugų..
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 2–8 teams compete to complete contract work for the "mafiya", such as escorting/killing targets or stealing cars; Team Car Jack City where 2–8 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.
