Lots of corridors, no places to hide, no aliens. If you use the enclosed shapes patch, the walls have pictures of all the IRC #marathon folks. Way too many invisibility powerups (IMHO).
A large circling hallway system that goes around an "arena" like you've never seen before. Remeniscent of the tron disk fights, however this time you have more than a flimsy little frisbee!
Extremely neat creation for it's time, it has been converted to be better for Infinity, and also an altered version called Flying Leap takes it further. This one has Original "Marathon" feel allll over it.
Frigidman's first ever full map made for any of the marathon series. Its a novelty item! This map was the first ever map recorded in history to be made from the ground up for Marathon.