The Interdiction Zone

The Interdiction Zone is a single-level PWAD for Doom II. It was designed by Jim Flynn in 1994.

Secrets

 * 1) The sector near the start with the backpack whose floor is raised to allow access to the teleporter out of the first part of the level counts as a secret and is impossible to miss. (sector 20)
 * 2) The sector opposite #1, which contains the switch that raises #1, counts as a secret and is impossible to miss. (sector 21)
 * 3) The front part of the room with the switch which lowers the initial lift (allowing access to #2) counts as a secret and is impossible to miss. (sector 32)
 * 4) The sector with the rocket launcher in the south-west counts as secret and is impossible to miss (entering it opens up #3). (sector 57)
 * 5) After going through the teleporter in #1, you will climb some stairs then jump through one of several windows to reach the large central area.  There are two circular platforms in the water here - the steps surrounding them can be raised by pressing a switch in the centre of the water.  Stepping onto the steps activates crushing ceilings on the platforms - however, when you reach the top of the steps, the ceilings will stop crushing.  Both platforms contain energy cell packs, and both count as secrets. (sector 125)
 * 6) See #5. (sector 163)
 * 7) To get the red key it is necessary to jump from a narrow ledge that lowers as a lift.  From this ledge it is possible to reach an energy cell pack to the south. (sector 256)
 * 8) The blue key room, which can be opened by pressing a switch, entering the opened room, grabbing a nearby health bonus, pressing the switch again, then shooting the revealed wall, counts as a secret and is impossible to miss. (sector 216)
 * 9) At the top of the staircase leading down to the blue key room, there are several booths with stools by them.  One of these stools is blue - walking into its booth opens it up.  Walk through the gap - this opens another gap two booths further south.  Run through this gap - another gap opens up opposite.  Run through this gap - two doors open.  The one to the north contains a backpack and either a hell knight (easy and medium skills) or a baron of Hell (hard skill). (sector 372)
 * 10) Go through the other door opened up by opening up #9.  You will be in a room with several bookcases.  Going into the first, thirs or fifth aisles opens up an area with several demons and a medikit.  (sector 294)
 * 11)  Entering #10 closes the door to the room and opens up a room to the west containing a soul sphere and two arachnotrons (three on hard skill).  A section of wall in #10 juts out slightly - it is a fake wall, leading, via several doors that open on approach, to an area south of the area with the booths (this area is also accessible by lowering a section of the barrier manually).  This areas contains two platforms, one with a health bonus on it, that can be climbed onto.  The wall to the south of these is a secret door, leading to two boxes of rockets and an energy cell pack. (sector 347)
 * 12) After getting the yellow key, press the switch ahead (it requires the blue key).  A large door will open in the main central area.  Walk from this door onto the arrow-shaped section of floor.  The floor ahead will rise, allowing access to the platform with a megasphere. (sector 131)

Current records
The records for the map at the Doomed Speed Demos Archive are:

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