One side is full of canyons and ledges, the other side is a fortress. Between them is a lava river that serves more than one purpose. This map is really pretty to look at, but if you play it with aliens on, you'll never get to see that... A little bit of smearing at the bottommost corridor, where the lava comes up too high, but nothing major.

Three maps. Dark Temple is just what it sounds like. (Pretty open though...) Mash Pit is a tiny arena, with a smaller hill surrounded by pfhorslime... looks like horribly high carnage rates. The Island is a Thunderdome-style map with the central area filled with water, and the hill reachable by retractable bridges.

Reminded me a lot of Spiral Insanity. An outside ring borders a mazelike multilevel building, with lots of ways to get around. A little jarring at first, but after playing it for a while, it starts to look quite nice. Best views seem to be while lying on your back in the outer ring, looking up...

A shallow, waterfilled central arena and some interconnected passageways around the outside should keep you looking over your shoulder for that next grenade...