Deadly Vengeance v5.3.3
A HUGE level. Would fit about 30, but has weapons for maybe 2 (and that's pushing it). Pretty nice to look at, though... 775 polygons, so don't bother with a low-end machine. Designed as a net level, but can be played solo.
Levels in map "Deadly Vengeance 5.3.3":
Die Hard