Secret levels

The First Secret Level. (connected through 0-2.)
The secret level is a series of dark hallways with no natural illumination whatsoever. The enemy can be described as a very tall stick figure with thin arms and legs that instantly kills the player and disappears on contact, though the only way to see this happen is to use the major assists function. The enemy has no face or features that would make it identifiable. The unknown enemy stalks the player and seemingly comes out of nowhere, it's only warning to the player that it's near is a sound that plays, leaving the player with very little time to react and get away from it. The player is stricken to using the revolver as the only weapon during the level.

The secret level begins with the player dropping into a level start room that is grey instead of the typical red/orange color palate. Leaving the starting room will bring the player into a room with a blue skull on a pedestal. This skull emits very little light and the player must use it to navigate the area. Using the melee ability will cause the skull to illuminate the room stronger for a short period of time.

The player must navigate through these dark rooms to find an air vent near the floor. Going through this series of vents will lead the player to a bigger room. Near this room and illuminating the area with the melee function, the player should find a blue pedestal and a big door. Once the player has placed the skull on the pedestal, the door will open and reveal a red skull. Using the red skull to navigate the player must find the red pedestal and place the skull on it, which will reveal another room with the level exit.

The Second Secret Level. (connected through 1-1.)
The secret level is a series of Puzzles. Completing each puzzle set will unlock the door to the next room after the last room's puzzles are completed the level-exit will open. There are no enemies in this secret level. Although the beginning of the level is gray its pallet quickly changes.