If the OP hoped somehow to be able to say "PC/360 games" are 360 exclusives, the answer is simply, no, they're not exclusives, as it was already explained 200 times.
For example I play Mass Effect on PC (best version) so it's not a 360 exclusive at all.
No need for the PC to be a console for that. Those games are just "multiplatform games".
A 360 is a PC with a controller, no difference. Both are very similar platforms.