I'm sorry I didn't respond to this earlier, but my brain fell out!

Neotokyo is a HL2 mod that's basically like Counterstrike mashed together with Ghost in the Shell. You get to pick between 3 classes, each with a different (but somewhat overlapping) weapon selection, different attributes like therm-optic camo, and different alternate vision modes. The game encourages careful play, it's pretty much impossible to run and gun except as a Support (huge armor, ignores headshots), but then "run" is really sort of crawl. One caveat, voice communication and team coordination is essential, and I haven't played in a while but it was usually impossible to get that with pubs.

It's still pretty nifty though.