Just thought I would add this.
Back in the day ('03) while deployed, the favorite pastime of my dudes in my HQ to blow off steam when not out on missions was to play UT on our internal, unclass LAN.
It was a great way to vent and let our hair down a bit. In fact, during a few massive slugfests, several folks would stop by to let us know we were having too much fun. It was UT or going crazy. UT won the day!