MAP20: Breakdown (Doom 64)

One of the most disturbing maps, large portions of Breakdown shift and change completely, disorienting the player and making navigation difficult. The BGM consists of suffering demon moans, the voices of humans ranging from tormented souls and marine communication speak, and fly buzzing. In the Doom 64 TC, a shrine of Scuba Steve can be located. The console version contains an extremely difficult to find secret which only a select few have discovered. No information is known regarding this hidden room. Even the designers of the level do not remember how to find this secret, according to an interview on Doom Depot.