This is completely natural. When a 3rd party exclusive game becomes rather successful, it starts flying off to other platforms. Remember when Resident Evil 4 got released on PS2? Every other Resident Evil game that came out on the Gamecube before RE4 just didn't make the cut... And at some point the monetary benefits of going multi-platform outweigh the benefits of the exclusivity contract... This is the reason why Sony had to make sure that both PS3 and PS4 just had to have better hardware than their peers... They learned their lesson the hard way after GTA San Andreas got released on Xbox, which was followed by vice city (At the time they were among the best selling video games of all time, while still PS2 exclusives). Most of the time one could count on a game being completely exclusive for 1 console either because it was made by a first party developer, or because it was't exactly a "smash hit"... The problem with exclusivity contracts is that they have a time limit... That being said, I still think it's worth it, because I for one really appreciate playing games as soon as they're released... So sometimes what we'd be getting at the end out of a "3rd party exclusive" is a decent head start, which is something that I completely appreciate...