MAP04: Inner Sanctum (Insertion)

MAP04: Inner Sanctum is the fourth map of Insertion. It was designed by David Shaw (Tolwyn) and uses the music track "Scent of Hell" by David Shaw.

Secrets

 * 1) In the room with two terminal lifts, take the north one down and follow the path until a fork. Flip the switch in the south fork, then head back to find an opening with shotgun shells, ammo clips, and a rocket launcher. (sector 28)
 * 2) In the room with two terminal lifts, take the south one down and follow the path until you get to two switches. Flip the first one, then quickly backtrack until you find an opening on the north wall where you will get a backpack. (sector 76)
 * 3) Climb the steps near the yellow key to raise the damaging slime pits at the west end of the area. Press on the poison sign in the south pit to get a computer area map. (sector 143)
 * 4) In the corridor with two switches, flip the middle one. Go to the room with the red door and enter the southeast corridor. Use the switch at the end, then go back to the corridor where the two switches are to find a third switch north of them. Approaching the new switch will open a monster closet on the south wall. The switch in there reveals an arrow in the southeast corner which can be opened revealing health bonuses and a switch requiring the blue key. (sector 183)
 * 5) At the east end with the invisible bridge over lava, press the lion switch at the east end, then go back to the room with two terminal lifts. Go towards the southwest switch and ride the lift up, then go to the south wall to get a box of shotgun shells. (sector 125)
 * 6) After you get the blue key, go to Secret #4 and press the switch there, then head back to the corridor and another switch will be available to the west. (sector 186)
 * 7) The switch in Secret #6 opens a hallway in the yellow key room leading to a megasphere. (sector 200)

Current records
The records for the map at the Doom Speed Demo Archive are:

The (absence of) data was last verified in its entirety on April 3, 2022.

Player spawns
This level contains six spawn points:
 * 1) facing south. (thing 122)
 * 2) facing north-east. (thing 123)
 * 3) facing north-east. (thing 124)
 * 4) facing east. (thing 125)
 * 5) facing west. (thing 126)
 * 6) facing north. (thing 127)

Things
This level contains the following numbers of things per skill level: