MAP16: Io Base (Hell To Pay)

MAP16: Io Base is the eighteenth map of Hell To Pay. The discrepancy between map slot and progression number is because the MAP31 and MAP32 are inserted between MAP15 and MAP16 as part of the regular progression, instead of being secret levels.

Secrets

 * 1) In the main structure, the platforms in the centre can be lowered. They count as a secret. (sector 123)
 * 2) See secret #1. (sector 316)
 * 3) In the red room after the pillar platforming segment, an alcove will lower with an energy cell pack. The alcove counts as a secret (southwest alcove). (sector 324)
 * 4) See secret #3 (northwest alcove). Jumping over the pillar in the middle will lower this instead. (sector 325)
 * 5) See secret #3 (northeast alcove). Jumping over the pillar in the middle will lower this instead. (sector 326)
 * 6) See secret #3 (southeast alcove). (sector 327)
 * 7) Jump over the pillars as you did in secrets #4 and #5. The wall with the soulsphere counts as a secret. (sector 328)
 * 8) In the main structure, go across the bridge on the right and enter the room. The wall in front of you can be opened for a rocket launcher, twelve rockets and a medikit. (sector 368)
 * 9) In the main structure, take the northern teleporter in the centre. After teleporting, look behind you, jump down and run to the left where you will find a teleporter with a megasphere inside the alcove. (sector 379)

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

The data was last verified in its entirety on January 16, 2022.

Player spawns
This level contains seven spawn points:
 * 1) facing west. (thing 237)
 * 2) facing south. (thing 239)
 * 3) facing south. (thing 245)
 * 4) facing south. (thing 246)
 * 5) facing south. (thing 247)
 * 6) facing east. (thing 248)
 * 7) facing east. (thing 249)

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