This map has some really great lighting effects. Unfortunately, it also has a bunch of rooms that give me a nasty headache. Worth downloading for the ideas alone.

7 levels, made by three different people. Nice layouts, mostly, but they might be too big small groups.

Four more from the master of mass destruction. Defense Drones 2 lives up to the suicide billing quite nicely with anything over 2 players.

A pretty nice net level if you stay in the center arena, but it gets hellish if you enter the outside passages...