Nice layout and architecture. We played through fine, but long fall on 2nd map could be impassable if you're low on health. Nostalgic fun for DOOM fans. Cool bridge, crusher, puzzles, FX, etc. Almost failed when we couldn't find the security pass, but we were able to obtain the data CD without it by using cooperative jumping.
Magnificent design includes great water-engulfed level.
A full unit, true commercial quality but free. Yer basic fine level, nice visual detail. Fun while it lasts. Huge battles, gorgeous water caves, made for co-op. Very hard to squeeze thru start lasers after reactivation.