For mech geeks, TPS geeks or if your pc's too slow
http://mirrormoon.org/projects/windom
it's just 59mb, it also has a multiplayer feature.

The Details - uh, see for yourself
Just another good way to kill time
Edit:
Multiplayer doesn't work well
but here's some games
http://www.freepcgamers.com/2008/03/...ames-list.html