A large, two-level arena. The hill is elevated, and can be reached from walkways at all four points of the compass. Travel between the floor and the upper areas is well-facilitated, and in general, flow is quite nice. The hill's big enough that you can dodge almost anything coming at you... in order to knock someone off, it'll be necessary to get on it yourself. Update tweaks alignment and object placement.

Two levels. One is a conversion of Bob World HQ (no credit to Mark Conahan, the original creator), using the alien textureset, and the other is a small insanely busy arena with a raised cross in the center.

A pretty cool small level designed for two players. You face each other across a lava moat. Both have a large wall to hide behind, but your opponent can raise yours with a well-placed projectile, leaving you defenseless... and for those who believe the best defense is a good offense, you can build a bridge across the moat (although it's not necessary-you can simply run across, using the alcoves on the side).

A simple arena in two flavors... one has a walkway around the outside of a lava pool, the other is the same with a hill poly in the center. Weapons are really tight (looks like they're set up for two-player games... which is okay, I guess, since more than three (or maybe four) would be insane.