4k1x3r on 23 March 2010
Prologue is Prologue, '-' it's a demo, GT4Prologue sold less than 2 millions copies, look how much copies it sold when the game came out... GT5P is the best Prologue for the moment in terms of sales. (and it sold like 4.8M with PSN downloads). It's the first car simulation game for the moment on this gen, even Forza 3 didn't match those numbers although it's a finished game. GT5 will be fucking huge dude.
