Room 3: The Void.
The void is a housing for matter that was built to seal up the void, however this was a failure and became Room 3.
It is simply a gap inbetween reality itself, so do not be afraid to enter. Take precautionary measures.
Light cannot penetrate the void, creating darkness for anyone inside.
Please avoid falling off matter that is housed inside the void, or you will ,..0,0,0,100,0,0 and [redacted].