With "raped again and again in a brothel" you mean the ending where you end up broken and pregnant?
That's seriously a BAD END for me.
Here are some
==== MAJOR SPOILERS ====
for some of the more humane solutions:
These are the three easiest, different ways to get to 3rd floor:
1. Light a fire in a remote location. Needs lighter and accelerant.
2. Flood Utility room. Needs crowbar and has to be done three times.
3. Seduce Gate Guard. You have to talk to him several times until he takes you to his bed. Ends with vaginal sex and creampie.
After getting to 3rd floor by way of 1. or 2., hide in vent, wait until dark and enter room at the end.
Sleeping with the guard by way of 3. automatically leads you to meet Alex in the night.
You can read additional, more detailed information in my mini help file: https://drive.google.com/file/d/1hZxrF7ccnDW86XaloKSXf7GQc9zPAzMg/view?usp=drive...