The older 2D GTA games started on the PS but were ported over to other systems, so they weren't exclusive. And Well III, VC and SA were TIMED exclusives and were released on the Xbox later down the road. Hell before Sony dealt with Rockstar on that issue GTAIII was originally planned for the Dreamcast. The reason it was a timed exclusive was because SONY had a contract with Rockstar to keep it exclusive for such a time frame, otherwise it would have went to Xbox and PC sooner than it did, bank on it.

This time before Sony could get their little greedy contract claws into Rockstar again, MS stepped up and made a deal with Rockstar to not only get GTAIV the same time as Sony but to have 2 Exclusive Episodes of their very own.

You get all pissed off because MS made a deal with Rockstar even though Sony did same thing last generation. It's a bit of a double standard.