If you want realism: No.
The singleplayer is pretty good but nothing outstanding. If you can find it cheap it's probably worth it.
EDIT:
I didn't take this one. I just want to raise a bit of awareness for this mod:
WesternQuake3. I'm running it with ioQuake3 without any problems so it's basically a free game. The developers are working on a real standalone that won't require ioQuake3 and is an updated version of the current WesternQuake3. In the evening there are often people on European servers. Hop on too, the game is fun.