A snowy map with a small final arena that blends indoor/outdoor sections in a layout that seems to expand as you progress. The textures are ripped from DKT and Hexen and are surprisingly crude compared to other levels with the same graphics. Several areas have a definite cartoon vibe but there are also many instances where they work well. Only the hexagon doors are out of place. The garish new monster skins don't help. The grim overcast sky does. Also of minor note is the new nailgun sound. It's okay, but would have been better with a new model like the one from anevil.
Brushwork is sometimes crude (doors appearing on the other sides of walls, still? =)) but always intricate and effective with the requisite weird angles. Several impressive areas have uneven floors which give the map a touch of realism and also make combat a little more interesting. The rock walls were made with a strange angular technique that is quite appealing, although they look somewhat short. Except for a corridor or two, there are no "box" areas, and the most visual sections are the atria where multiple levels intersect. There is also one nice ruined section. There are a few b0rked fulldark surfaces but the lighting is great overall, with good sunlight outside and torches inside.

The map is consistently heavy on ammo and light on health (unless you're good at finding secrets, which is easier in software mode) but other than that, combat is varied with an appropriate mix of strafing, sniping, and other violent goodness. Reinforcements have a demonic habit of appearing, usually from behind hidden doors, just when you think an area is secure. The gremlin makes an appearance in huge numbers, but for some reason never in a location where it can be a huge threat. Other enemies are placed with an appropriate attention to their strengths, especially the new rocket ogres. Weapons are positioned well with the rocket launcher just before the final combat and no thunderbolt.
The final arena map has several good but mildly frustrating ideas. It can be very difficult to survive without taking the right type of evasive action. However, the way you trigger the final switch is cool and there is a very useful secret before the end which, strangely, doesn't trigger any monster drop-ins. =)