MAP20: Central Processing (TNT: Evilution)

MAP20: Central Processing is the twentieth map of TNT: Evilution. It was designed by Drake O'Brien and uses the music track "Horizon" by Tom Mustaine.

Layout
Central Processing is a very large map and it can be also very hard, expecially on the highest difficulties. This is because of the large number of nasty monsters (expecially chaingunners) and of the limited health that it offers. The level can be divided in three sections:

-A tech base where you can grab the red skull key

-A cavern-style part which is accessed through the red door

-A wide open area which is accessed through the yellow key and where is the exit

The wide open area is actually the biggest area in the map.

The tech base
Your starting area is a "T"-shaped hallway which contains imps and gunners. On the right extension of this hallway is a door: open it. You'll now enter a black-walled room with several computer desks, imps and some other monsters. If you want to get 100% items, be careful: behind most of the desks are health bonuses that sometimes you can't see. In this room is a teleporter; step through and you'll be taken to a nearby chamber with some crates in it. Kill everyone that is in this chamber, then you can exit and get back to the computer desks' room. A wall has opened revealing many enemies. Destroy them and then step on a wooden floor: some stairs will rise, allowing to go to the top. Continue moving forward and killing some enemies until you get to a slow elevator. It will take you to a long hallway with a blue platform. When you step on it, a wall next to you will open up, revealing a terrible trap and the red skull key. Grab it and another wall will lower, with gunners inside. Continue walking through the corridor and ANOTHER wall will reveal a trap and a weird room with some pillars, a berserk pack and a teleporter. This teleporter will take you back to the starting spot. In the "T"-shaped corridor two traps (one in front of you and one behind you) have opened: beware!

The cavern
Across from the first door you have opened in this map is the red door that now you can open. Deal with a couple of more traps. In the room you are in is a door: it will lead you to a slime pit, but there is another way to get to that area: in the same room is an opening to a long passage way with enemies, slime and several small areas. Follow it until you get to a pit: drop into it, kill some monsters and grab the blue key. Find a wall that you can open and continue following the tunnels and killing some imps. Eventually you'll come to the slime pit. As soon as you shoot, lots of enemies will teleport in creating a dangerous situation. There is also the blue door, with more enemies inside. Once this large ambush is over, find a swith and shoot it. Now you're able to get the yellow skull key in a room next to you. You've finished the cavern part of the map. There's one thing left: the wide open area.

The LONG ending
In the room with the yellow skull key is a pillar that you can open. Take the teleporter and you'll be taken near to the yellow door, in the tech base. Open the door and now you're in the final chapter of this mission (and the longest one). Kill all the enemies in your first area, which is an outside area with a temple-like building, a river and three balconies with gunners on them. There is also a small opening with easy to miss gunners. Once everyone is dead, drop into the river and follow it until you get teleported on a balcony. When you jump down, some enemies will teleport in a little pool of blood. Near this pool is a big blue door that will lead you to an extremely big outdoor area. Try to kill all the enemies that you can see, both on you shore and on the opposite shore of a long river. At this spot, you can progress towards the exit, but the monsters in the river will continuously shoot you. There is a way to kill them all. From where you entered, turn right and take a teleporter. You'll be on the top of an island. Jump down and grab a soulsphere (it's guarded, be careful), then find an opening in the vines that surround you and jump down. Leave the island and kill everybody that is in the river (included a dangerous spider mastermind). You also can kill the enemies on the upper ledges in the area you are in. Once you've finished destroying your foes, find a teleporter and take it. You're back to the start of the wide open area. Follow some steps to a lift that you have to lower. Open a damaged-looking wall in the alcove you've just got and take the teleporter inside (this is a mandatory secret). You'll be teleported to another ledge of the outside area. Follow the right side of it until you find a glowing skull decoration. Here you have to lower a giant lift that will take you to an area with several imps. Find an opening in the vine fences and jump down. Follow this ledge until you come to a teleport. Take it. Now you're in front of the exit switch!

Secrets

 * 1) In the room with some crates in it there is a series of small crates leading up to the top of a large wooden box with some shotgun shells on it. Open the wall of the adjacent crate (it has a "3" on it) to reveal a secret area. One of the walls inside this secret can open, letting you exit. The first two secrets contain enemies, so if you want 100% kills you will need to access these.
 * 2) Accessing secret #1 will cause one of the walls in the crate room to lower, revealing some armor and a computer map. The outcropping near these items has a red brick texture; lower it for a medikit. Ride the lift back up and you'll reach a secret area with a BFG. While standing at the top of the BFG's pedestal, you will see a gargoyle face on the wall far to the south. Shoot it to lower the nearby gate, letting you exit through the teleport in the gargoyle's alcove.
 * 3) While traversing the tunnels in the cavern-style part of the level, you'll find a final long tunnel leading to the slime trail. The first half of this tunnel is tagged as secret area. It's impossible to complete this level without triggering this secret.
 * 4) The second half of the tunnel from secret #3 is also tagged secret and impossible to miss.
 * 5) Upon entering the room with the yellow skull key, you'll see the long, diagonal wall to your left lower before you can reach it. Simply open it back up to get the bulk cell it hides.
 * 6) Just around the corner from secret #5 (directly across from the yellow skull key itself) is another openable wall with a slightly different texture from the ones surrounding it. This one holds an invulnerability sphere.
 * 7) The mandatory secret in the huge outdoor area.

Bugs

 * It is possible to get stuck permanently if you don't have the super shotgun, and straferun from the BFG's pedestal into the barred corridor in secret #2, before you have shot the gargoyle face. Since the gate blocks your path in the north and the face lies too high to be hit from the corridor (except with the vertical scattering of the super shotgun), you can only load a saved game, kill yourself to restart the level or use the no clipping cheat to make an escape.
 * Not so much a bug in itself as an opportunity to see one, collecting the Soul Sphere on the damaging floor in the outside courtyard is a great place to see the ouch face bug.
 * There is an unreachable energy cell pack inside the wall (not part of any sector) north of the yellow door.



Records
The Compet-N records for the map are: