This is a great map!!! It is based on three rings, the outer one with windows that open so you can pick off your friend, the inner one that has the most room with some aliens and weapons, and the inner one that I felt a little cramped at times. All in all a cool map with a couple of secret transporters to some secluded areas..and just enough media but not too much. Water in this case. This one can be played solo also just watch out for the inner ring. Construction is quite good and there are some cool lighting sets.

Two levels: one cross-and-ring based over lava, and the other a huge water-filled room (with water pillars for gaining altitude). The fire level feels a lot like an old Mike Neylon level, FineLine, for anyone who remembers it. Update adds a custom physics model (you're faster, now) and removes the water level.

A medium-sized generic level. There are open areas and enclosed spaces, and multiple tiers, so most play styles should be accomodated.

A relatively short solo level, where your job is to find the final term. Well-constructed, with switch-controlled doors making sure you see the entire map before exiting. The final battle is a nice one-on-one with a major jug... let's hope you brought enough ammo!