An open shallow pool with several simple corridors around it. Hallway space is tight, so if you're out of ammo, you're dead. Carnage rates should be high, especially with aliens on...

It doesn't get much simpler than this. A big figure-8 racetrack, with lots of baddies, and lots of stuff to kill 'em. (And your friends, of course.) All starting positions are in a row, so you could play this one as a real race... first one across the finish line wins. (Mario Andretti never had to worry about being shotgunned from behind...)

A large, symmetrical map that penalizes you for moving around. Fastest way from one side to the other is via a pfhorslime pooter, but it can be worth it. Watch the crushing doors... and keep an eye out for the odd enforcer. Reminds me in places of a few M1 levels... but I think it's just a feeling, not anything concrete.

A remake of the first outdoor area from Kill Your Television, with the addition of a pair of Juggs. Sort of weird... there's tons of SPNKR missiles here, but not one SPNKR. The physics model included, though, gives you missiles instead of grenades, and a whole boatload of 'em... so you should be okay. I suppose.