Windows 7: I need a good FPS Campaign game... help me out.

Good ****ing game! I loved that game back in the day! you brought back so many memories mentioning that game haha.

There have been nothing but great suggestions to this thread, Some that I can think of, I haven't read most of the posts but here's what I play (That haven't been mentioned):

Dead Space
STALKER SoC
FEAR / FEAR2 (First one is better IMO)
Zeno Clash
Portal
All the Half-Life's

Games im waiting on:

Mafia 2
Batman Arkham Asylum
Operation Flashpoint 2
Left4Dead 2
Dark Void
Dead Space 2
Section 8

There are a couple more but I have to go check my GameSpot list and I'll post them here.