Modern Combat 1 has a decent campaign, Modern 2 has a good campaign and also very re playable "Special Ops" missions, and MW3 is ok with some of the same options as Modern Warfare 2. By this point you'll be burned out on Modern Warfare games but at least on the PC you can crank up the options and get the best possible picture out of the aging engine.
There are lots of shooters worth playing on the PC, and not all of them brand new....and many of them a few years old now can be found on the cheap, particularly once they are available for direct download.OH DUH...and of course if you want the ultimate in hard, tactical shooters.....look at the ARMA games. They are the most realistic shooters out there, and I mean that in the cruelest sense.....I used to play quite a bit of the Operation Flashpoint games, which is the original version of these modern ARMA games, and they require you to adapt to a completely new style of game play. Many a night I spent hours getting through a mission by creeping along, listening for bad guys, hoping a patrol didn't stumble onto me or slaughter my team and leave me alone.....a great game, but one that will erquire you to dramatically change the way you think about shootershttp://www.youtube.com/watch?v=_UeoR...eature=related