A large room, with a raised central platform. The center of the platform moves, bringing you from level to level. Teleporters on the outside enhance flow. The upper section can be truly dangerous to those on the ground, since it has safety ledges to hide behind...

A straightforward arena. This one's dark, and rectangular, with a couple of (well-lit) sniper perches and a few small pools to lurk in... and more than enough ammo to level a small European country. The prize goes to he who moves the fastest... there's almost no place to hide.