Forgot to mention I'm mostly into the on-line multi-player aspect of such. Does Dues Ex sport such?
I've actually re-installed RTCW:ET (again) and been playing it. It's 10 years old and there are still more people playing it than some other FPS that are a year old, lol.
It is awfully dated, though. But the nostalgia is fun.
They're making a new RTCW game for this summer, hope it's better than the last one in 2009 that was horrible...