21 Bunker Room

Finding your way to the Bunker itself you'll find the clue written on the wall. (Only recently found out I've been walking the long path going to the right!) You can hook a left down the stairs and walk straight to reach the bunker instantly and follow that path back as well.

22 House of Doors Room

In one of the many rooms you'll find a clock. The time on the clock is the clue for this room. The Clock spawn is random to my knowledge. Still experimenting to see if there is an exact science to it.

23 Parking Garage This one stumped me for a while and honestly I am not entirely sure if the answer I found is correct or if I keep getting lucky with it. My method has been to count the amount of Red Cars in the garage to obtain my clue but I am still experimenting with ideas to be sure this is the actual answer.

5 total cars in this garage. 2 red, 3 black. Floor was a 3. Marked it as an incorrect room and was correct, so far, theory pans through. I did hear someone say that the correct answer is when the amount of red cars matches the amount of black cars (though this number still needs to match the Floor Number to be completely correct) and I haven't tested it enough to be sure.