Where do I put the electronic key for the "ultimate challenge" on stage 1? Cant join your discord dude. I think the invite expired. And even so, nobody can use the nsfw servers without scanning their face. NSFW is the thing I'd LEAST like to scan my face on.
I don't have access to discord right now, but you can try this one:
It depends on what key do you find. First challenge on the "blue floor" in the one of the rooms. Second is on the same floor in the director's office. Third one is on the basement friege. Forth is on the "blue floor" office from the left. And last one is in the storage on the basement upper segment in the electrical room. After that you need to enter the code on the "blue floor" exit. Of cource there are hidden scene with another ending and three scenes in the chair room, but, you need to find random appeared tokens.