A wide-open, dark arena with lit sniper ledges and a lit hill. Straightforward, but fun.

Platforms acting as walls constantly change the shape of the playing field, providing differing paths for getting to your objective. Not much to look at, but can be fun to play.

A central building with some very confusing insides, and a few outer passageways. Hard to get used to.

Sort of in the vein of Everybody's Mortal But Me, but with way more complexity. A central hill, in the middle of a raised cross... with lots of platforms (all nicely fast) and lots of teleporters (easy to figure out)-flow is superb, plenty of weapons... carnage should be really high.