- This level occupies the map slot MAP01. For other maps which occupy this slot, see Category:MAP01.
MAP01: Trooper Trauma is the first map of 1 Monster Megawad. It was designed by Mike Wiesenauer (deldelda) and Mark Pedersen (Macro11_1). As with the rest of the maps in 1 Monster, it features a unique setpiece: its only type of enemy is the basic Zombieman, appearing in overwhelming numbers.