Communications Transfer: Maintenance and Transfer Station

Communications Transfer: Maintenance and Transfer Station is the tenth level of Doom 3. There are several outdoor areas in this level. The first cacodemon appears at the start, and the Chainsaw Zombie makes its first appearances here. The berserk powerup appears for the first out of two times in the game. The player must use a mobile service lift to get to the exit.

There are also three sections where the marine is exposed to the outdoor atmosphere.

Summary
The player starts inside an airlock and needs to go through a short surface area (where a new enemy, the cacodemon, is encountered), a service station, including maintenance crawlway, and through another surface area underneath the station to get to the transfer station.

Once inside the transfer station, the player goes through the garage where Swann and Campbell are seen travelling by car to the Communications. The player needs to find a James Holiday's PDA in a nearby storage room to update the clearance level, but upon picking it up, is confronted by another new enemy: the chainsaw zombies. After unlocking the door, the player goes through a dark corridor that is glowing with satanic symbols under the Hell's influence. The player then goes through another area corrupted by hell, this time it has a large lava rift on the floor. In fact, the whole station is corrupted, with fleshy growth encountered in many areas.

To exit the station and reach the communications facility, the player needs to travel to Station 3 and exit through the door there, but it is locked, so the player needs to go to the security room in order to unlock it. To reach the security room, the player has to call the transportation lift to either Station 1 or 2 and, using it, move to the catwalk above the rails on the way to Station 3, then ascend the lift to jump onto it. One of the door from the catwalk will lead to the security station.

After removing the look, travelling to Station 3 and exiting it, the player will suddenly be trapped in a room with a Berserker power up and a large group of zombies. After a quick punch-out, the player finds the airlock exit out of the station and goes through the last surface section of the level and reaches the Communications.

PDAs

 * James Holiday: Found in Service Room 2B.
 * Ron Ridge: Found in PRC Maintainence.

Characters

 * Sergeant Kelly
 * UAC announcer

Weapons/Items
Two of the air canisters are unobtainable since they're located inside the facility where they're not required and thus cannot be picked up.

There are also two health stations on the level, with 50 health in reserve each.

Secrets

 * In the first outdoor section, one can go to the left and find a hidden passage that leads below the mountains where some supplies can be found.
 * In service room 1 B, right when the player has to descent a set of stairs, there's a small piece of machinery sticking out of the right wall. If the player looks at it from the stairs' side, a very small control panel can be seen which, if pressed, will reveal a small alcove in the room downstairs.

Trivia

 * The frightening - but harmless - monster head that pops out at the player early in this level says the words, "Metus, dolor, mors ac formidonis" which is Latin for "Fear, pain, death and terror."
 * The one chainsaw lying on a crate inside the room where chainsaw zombies are first met is actually only a prop and thus cannot be picked up (as player is supposed to take one from the chainsaw zombies).