The levels in this unit represent the status of the game as it was displayed on the Electronic Entertainment Expo '97.
Featured here are versions of "Main Gate", "Torture Chambers", "Pumping Station 1", "Upper Mines", "The Reactor", "Ammo Depot", "Supply Station", "The Warehouse", a cut level called "Lab Hub" and "Receiving Center".
The levels in this unit show examples of:
- Adaptational Early Appearance:
- You fight a Gladiator in "Main Gate" early than in the main game.
- The level "Lab Hub" features the Disruptor, the cut weapon from Ground Zero that was eventually implemented in the 2023 edition of the game, both in its version of Ground Zero as well as in Call of the Machine.
- Adapted Out: There are no Mutants in this version of "Upper Mines".
- Anachronism Stew: While the levels are period-accurate, the monsters and their behavior come from the actual 2023 remastered version.
- Early-Installment Weirdness:
- "Main Gate" takes place entirely inside the main building, which means the whole outdoors weren't developed yet. This includes the alternate route. It also contains several Tank enemies, whereas in the finished game, between "The Warehouse" and "Detention Center" you don't find any. The lasers area also doesn't feature any deadly lasers nor Enforcer balconies, and you find a Gladiator early.
- "Torture Chambers" starts ar the beginning of Cell Block B, cutting off the entire outdoors area. The water tube in the final version is also mostly dry, with an elevator taking you to the Security Pass area. (Oh, and there's no Security Pass!) You have to crouch through a hole you barely notice to reach a chamber with three computers, of which you have to destroy one in order to disable the yellow forcefields. Then you hit the exit of the level.
- "Pumping Station 1" is more or less closer to the main game. However there's an area at the beginning with a slime pool and a mixer that's omitted from the main game (being reused in "Inner Hangar" instead). It still qualifies for the trope, as the broken pipe that allowed the entrance to the huge secret area is sealed, and said area absent from this version.
- "Upper Mines" starts from the entrance to the outdoors area, with the gate that was added in the 2023 remastered edition of the map. It lacks the unstable corridor, but has the U-shaped corridor that also made it into the 2023 remastered version of the map. Finally, instead of finishing in the pit that leads to "Borehole", the level ends right before the corridor to the machines that have to be activated as the main objective.
- The level that would eventually become "The Reactor" is instead set in a space station of sorts, with an elevator leading to the corridor that in the final game is set between the Red Key door and the Reactor itself. At the very end there's a set of stairs that lead to an arena with a structure that quite looks like the Reactor.
- "Ammo Depot" is completely changed. While there are recognizable areas from the final game (the cargo room with the mover), it also features areas entirely cut or changed. In some areas, you have to travel backwards.
- "Supply Station" begins in the cargo room, and then you get to destroy the Strogg train. And that's it. No Power Cubes.
- "The Warehouse" begins (and ends) in the room after you used all the Power Cubes in the final game, the one with the lower cargo room and the tracked lift where you elevate an explosive box in order to detonate it.
- Finally, "Receiving Center" only contains the room with the lowerable lava pit. And a single Enforcer.
- Monster Closet:
- One in "Ammo Depot", right after traversing the T-shaped bridge. It contains 4 Shotgun Guards.
- Another in "The Warehouse", right after you blew up the big gate. Hosts a Shotgun Guard.
- "Lab Hub" has several:
- Right after stepping in the central platform, four nearby chambers open, revealing several Shotgun Guards and Gunners.
- In order to proceed to the next area, in the following room you have to lower the beds (starting the "stress test"). Each bed contains a Shotgun Guard.
- Point of No Return:
- Neither of the levels allow you to go back.
- "Lab Hub" doesn't allow you to backtrack once you dropped from the hole in the rotating device.
- With This Herring:
- All the levels give you right at the beginning the Shotgun, Machinegun, Chaingun, Hyperblaster and Railgun, plus Body Armor.
- Lab Hub adds the Disruptor to the mix.
