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).

Pillars, lava river, lots of ways to die. There are a couple of elevated rooms off the sides, with 2x rechargers in 'em... careful, 'cause they're guardable. (Also watch for a weird bug if you leave too fast... you can end up in a glass cage at the bottom of the stairs.)

A true cooperative map-pack... that is, this scenario cannot be played without at least two players. (You can't open the doors and switches without a second person).