It also does not use the hub "START" map where the player chooses a difficulty level and an episode; the difficulty level is chosen from a menu when starting the game, and all of the levels are played in sequential order from The Slipgate Complex (E1M1) to Shub Niggurath's Pit (END).
Ini juga tidak menggunakan peta "START" hub dimana pemain memilih tingkat kesulitan dan episode; Tingkat kesulitan dipilih dari menu saat memulai permainan, dan semua level dimainkan secara berurutan dari The Slipgate Complex (E1M1) ke Pit Shub Niggurath (END).