The Square Root of Pain
A medium sized net map with some unique construction. Four large rooms, with some of the polys assigned as slow moving platforms that recend lower than ground level that surround a middle "square" that acts as the hill. The whole map is visually open to itself. Meaning you are able to pick off marines in other rooms. Weapons are distributed with this in mind and the height of the walls match perfectly. Some good ideas and some great carnage counts with this one. Supports KotH, EmfH and KtMwTB. You can play this one solo as well.
Levels in map "The Square Root of Pain":
the Square Root