4 maps, with a pretty wide range of gameplay options. Tight-in play, wide open play. Claustrophobic flow, liquid flow. Aliens out the yin-yang, alien-free. One thing these maps have in common... you will NOT run out of ammo. Three of the maps use the Pfhor textureset, and generally do a pretty good job of it. The last is a huge waterset map, with almost all types of gameplay included... everyone should be able to find an area they like. Definitely worth a look.