E3M1: Bonus Level (Aliens TC)

E3M1 is the first of two bonus levels in Aliens TC. It was designed by Justin Fisher.

Secrets

 * 1) In the west of the level is an approximately L-shaped passage with several floor sectors inside a water pool.  The western part of the main northern wall has a passage leading to a switch.  Press the switch, come out of the passage, turn left, left, then right.  The floor ahead will have lowered, allowing access to a room containing some ammo, 2 stimpacks, and (on medium skill) a blue key. (sector 36)
 * 2) In the east of the level is a room with 6 large cylinders.  A lift on the middle right one allows you reach the top of this one as well as the tops of the other eastern ones by jumping (they contain some ammo, an armor, and 1 or 2 stimpacks). (sector 91)
 * 3) Just west of the exit is a north-south passage with 3 protrusions on each side.  The southwestern one is a secret door leading to a room with some health, ammo, a pulse rifle, and a grenade launcher. (sector 104)
 * 4) The acid trench alongside the yellow key counts as a secret and is impossible to miss. (sector 119)

Current records
The records for the map at the Doom Speed Demo Archive are:

The (absence of) data was last verified in its entirety on December 12, 2021.

Player spawns
This level contains fifteen spawn points:
 * 1) facing west. (thing 372)
 * 2) facing east. (thing 373)
 * 3) facing south. (thing 374)
 * 4) facing south. (thing 375)
 * 5) facing north. (thing 376)
 * 6) facing north-west. (thing 377)
 * 7) facing west. (thing 378)
 * 8) facing south-east. (thing 379)
 * 9) facing south. (thing 380)
 * 10) facing north-west. (thing 381)
 * 11) facing south. (thing 382)
 * 12) facing north. (thing 383)
 * 13) facing north-west. (thing 384)
 * 14) facing south. (thing 385)
 * 15) facing east. (thing 386)

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

Inspiration and development
During development, E2M5: Atmospheric Processor became so large that it was split in two, this being the second part. Justin Fisher states in the readme that it is the most difficult level in the project, and even he finds it challenging.