My favorite was Medal of Honor: Allied Assault. It's a pretty old FPS game, though. But I love the WWII European theater setting.
That's crazy! But the thing I miss is that games like that used to have solid single player campaigns that were more than 5 hours long. I don't get into multiplayer a lot.I agree about MOHAA. And its multiplayer is still alive - there are still hundreds of active servers out there filled pretty much all the time.