GTA IV was released on the 29th April, 2008. It is an action-adventure open world video game developed by Rockstar Games. Before I forget, download GTA for the iPhone, it is brilliant. You know exactly how the game works and it speaks for itself. It sold around 3.6 million copies on the first day of release grossing in over $500 million. It was a highly anticipated game and was worth every dime.