A multilevel arena. With aliens on, you're gonna be spending most of your time fighting ticks.
A dark arena with some sniping areas around it. A straight port of the M2 version.
A dark arena with some sniping areas surrounding it.
Dark, but with great flow, and a cool hill placement.
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...
Sorry, no description given at this time.
