1996 Single-level WAD for Doom 2 created by Rick Lipsey. The classic Doom level.
#7 of the Top 10 Doom WADs of 1996, chosen by Doomworld.com.
Non-linear buttonfrenzy map. The largest vanilla map at the time (Maybe The Invasion 2 The Upper Decks from 1994 is bigger / more impressive). Once released, it became the map all others strove to surpass.
Find a playthrough on youtube here: Youtube.com by user Aquarius1999, uploaded December 17 2019f.