Instead of the "late$t and greate$t"... (Score 1, Insightful)

Let the employees build it from older (perhaps donated) machines. No no no not Commodore 64s (though I recall some fun games from back then) but early PIIIs at best.

There are some great team-building games AND competitive games from that time. Some games were cross-overs (could be either).

Think about games that have become classics. They were meant to run on the older machines. Titles such as Star Craft, or even better Command and Conquer: Red Alert provide either head to head, team vs. team, or team vs. computer play styles. Did you get eliminated? Well, breaks over - back to work.

Or the earlier combat flight simulator games like F-15 / F-16. Those will play head-to-head also.

And one benefit to older FPS games like Duke Nukem was the ability to EASILY custom build maps - for example, a copy of your office... or the whole building... or even go older, to DOOM, and craft a bad guy to look like your boss...

Then again - your office, and the community in general, would probably be better off (Karma-wise anyway) if you used your older machines as donations to area schools (particularly underprivileged areas) and instead left work early twice a week to go mentor some kids.