However, upon completing it, the player will be taken to the level immediately following the one they were meant to access it from. If the player activates a secret exit elsewhere than in one of the four aforementioned levels, the player will go to the secret level as usual. The actions of the secret level linedef types have been hard-coded into the engine. E4M9: Fear, accessed from E4M2: Perfect Hatred.E3M9: Warrens, accessed from E3M6: Mt.