defnitely the best GTA of all, you will need a powerful PC though, to be able to enjopy the graphics and game play.
User Rating: 9.5 | Grand Theft Auto IV PC
Very good game! awesome graphics and good game play and sound, The story is very real. The PC version does have some glitches though. you will need a powerful pc to enjoy this game, specially a good video card. Besides all the good things from previous GTA versions, GTA IV has good music radios, the cell phone is very real, funny tv shows, and best of all the interactions with others during game play are very realistic. The new character (Niko Bellic) and the storyline are very good, and perhaps better than previous GTA´s mainly because it is a non-linear storyline, Niko is able to make decisions that will ultimately change the course and ending of the game. Also, Liberty City is the best portrayal to date of a large town that has funny and real characters and its own cosmopolitan vibe. It is an addictive game like all GTA´s, I did not play it on-line but i suppose it is good. GTA IV is the best in GTA series.
you should definitely add this game to your collection. ;) 
