A raised ring around a deep hole with lava at the bottom. Don't worry, the lava's shallow... and if you fall in (or jump in), you'll end up on top of the central flagpole. Only one way down from there...
A tower, surrounded by a lava-filled moat. You can leave the tower to grab the big weapons, but the bridges are narrow... careful firing that spnkr, you might end up in the drink!
A simple 5D arena (or pair of arenas, to be more precise). The name comes from the orientations of the hills (which aren't actually hills, unfortunately).
A central arena with lots of twisty passageways and out-of-the-way sniper perches spread around. A nice feel to it, although some of the staircases are hard to see around.
Two levels. The bottom is a maze of twisty passageways, with a few hiding rooms. The top is a more open circle-and-cross based around a raised pool (but still tight).
