Doom II, DOS, 1995 - 100% Level 27, Monster Condo

Doom II Playthrough, Level 27 - Monster Condo
A level a day for the month of October!
Ultra-Violence

The teleporter at 5:10 counts as a secret but cannot be triggered due to being one way, so 87% secrets is all you can get. Also, in the original DOS version, you cannot get 100% items either since there are two map items and you can only carry one per level.

100% Kills
100% Items
100% Secrets