E2M5: Atmospheric Processor (Aliens TC)
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E2M5: Atmospheric Processor is the fifth map of Aliens TC. It was designed by Justin Fisher, and contains a secret exit to E2M9: Alien Host Ship.
The map's subtitle on the intermission screen is Retreat to landing pads. In automap mode, the title is given as E2M5: Operations.
Contents
Walkthrough[edit]
Essentials[edit]
Other points of interest[edit]
The secret exit is located to the west of the normal exit, and is accessed from the central building via a yellow door (there is a yellow key inside the building).
Secrets[edit]
There are four broken sectors that are marked as secret: sector 233, sector 293, sector 301, and sector 316. None appear in the level, so the maximum obtainable secret percentage is 0%.
Bugs[edit]
None of the secret sectors have any sidedefs, making them not appear in the level, making it impossible to complete the level with all secrets.
Bugs[edit]
Demo files[edit]
Areas / screenshots[edit]
Speedrunning[edit]
As the secrets in this map can not be activated without cheating (see secrets), a NM100S run for this map is redundant. Other categories may ignore the secret requirement in this case.
Routes and tricks[edit]
Current records[edit]
The records for the map at the Doom Speed Demo Archive are:
| Run | Time | Player | Date | File | Notes |
|---|---|---|---|---|---|
| UV speed (normal exit) | 1:16.14 | PowerSlaveAlfons | 2020-11-29 | aliense2m5-116.zip | |
| UV speed (secret exit) | |||||
| NM speed (normal exit) | |||||
| NM speed (secret exit) | |||||
| UV max | 6:49.83 | Océan silencieux | 2025-03-27 | alienstce2m5.zip | Plays back only in vanilla and Chocolate-based ports |
| NM 100S | |||||
| UV -fast | |||||
| UV -respawn | |||||
| UV Tyson | |||||
| UV pacifist (normal exit) | |||||
| UV pacifist (secret exit) |
The data was last verified in its entirety on January 9, 2026.
Deathmatch[edit]
Player spawns[edit]
This level contains thirty-one spawn points:
- facing south. (thing 61)
- facing south. (thing 62)
- facing north-west. (thing 63)
- facing west. (thing 64)
- facing south-east. (thing 65)
- facing north. (thing 66)
- facing east. (thing 67)
- facing east. (thing 68)
- facing north. (thing 228)
- facing west. (thing 438)
- facing north. (thing 444)
- facing west. (thing 445)
- facing west. (thing 446)
- facing south. (thing 447)
- facing south. (thing 448)
- facing south-east. (thing 449)
- facing south. (thing 450)
- facing south-west. (thing 451)
- facing north. (thing 452)
- facing north. (thing 453)
- facing west. (thing 454)
- facing north. (thing 455)
- facing east. (thing 456)
- facing south. (thing 457)
- facing west. (thing 458)
- facing south. (thing 459)
- facing north-east. (thing 461)
- facing north. (thing 462)
- facing north. (thing 463)
- facing south. (thing 464)
- facing east. (thing 465)
Statistics[edit]
Map data[edit]
| Things | 471 |
| Vertices | 2159* |
| Linedefs | 2119 |
| Sidedefs | 3833 |
| Sectors | 333 |
* The vertex count without the effect of node building is 1704.
Things[edit]
This level contains the following numbers of things per skill level:
| Monsters | 1-2 | 3 | 4-5 |
|---|---|---|---|
| Egg (dormant) | 11 | 11 | 11 |
| Egg (hatching) | 3 | 5 | 6 |
| Face hugger | 3 | 7 | 7 |
| Alien warrior | 9 | 13 | 11 |
| Alien drone | 3 | 5 | 4 |
| Alien warrior (exploding) | 0 | 1 | 5 |
| Powerups | 1-2 | 3 | 4-5 |
| Armor | 2 | 2 | 2 |
| Medikit | 2 | 1 | 1 |
| Stimpack | 4 | 4 | 2 |
| Weapons | 1-2 | 3 | 4-5 |
| Shotgun | 1 | 1 | 1 |
| Smart-gun | 1 | 1 | 1 |
| Ammunition | 1-2 | 3 | 4-5 |
| Clip | 8 | 12 | 11 |
| Box of bullets | 1 | 0 | 0 |
| 4 shotgun shells | 5 | 5 | 5 |
| Grenade | 3 | 3 | 2 |
| Keys | 1-2 | 3 | 4-5 |
| Blue keycard | 1 | 1 | 1 |
| Red keycard | 1 | 1 | 1 |
| Yellow keycard | 1 | 1 | 1 |
Technical information[edit]
Inspiration and development[edit]
During development, this level became so large that it was split in two, the other part being E3M1: Bonus Level.
