A large open area with 4 lava-filled pits. Switches on the outside edge control the lava height... and the aliens that can nail you. Best as KOTH, but playable as EMfH.

A central covered arena, with a surrounding lava moat and a second arena above. Judicious use of 5D space to supply a nice quantity of carnage space. Also available in an Evil flavor.

A simple, square arena enclosed by a wall. Access to the wall is gained by climbing the water towers... but the towers can be enclosed in solid columns. Careful if you're going up, and someone's near the switch! Also available in an Evil flavor.

A cool idea, in concept... but we couldn't get it to work for us. The idea is that you've got a bunch of interlinked rooms... and monsters in a different part of the level will open and close connecting doors, seemingly at random. If it works, it's pretty cool... you'll never know if that grenade you shoot is gonna blow up in your face as the door closes. In practice, we only had a couple of doors open and close for us...