Room 500 features another meeting with Spooky and a second password plate. Spooky's gift to the player is "fixing" the door, which temporarily sends the player back to room 50. Nothing is new up until the point in room 60, where the player finds the "express" note, which instead of releasing Specimen 2, creates a door to the Express Tunnel, which will send the player to Room 512. It should be noted that enemies can spawn in the short walk from room 50-60.
It is possible to start the game from room 500 by inputting the password "CHEESE" in the settings menu.
These rooms add new forest layout rooms, with violent deer-like enemies that attack the player when they get close enough. The player then finds and equips an axe in room 554, embedded into a tree. The axe can kill the deer, but the player will likely take damage when attempting to do so. Interactions with the deer also occasionally display strange messages. There are a few cabin rooms with notes about the deer. In room 557, there are several doors that you can select, if you go through the right door, you will find a record player that you can turn on, which causes W.A.M (aka Wolfgang Amadeus Mozart) to appear. If you go through the middle door, you`ll enter room 558, where the player has to use the axe to break the boards nailed to the door. Finally, in the left room you`ll find a key (it`s purpose is still unknown, as the middle door is initially open). Once the player reaches room 559, Specimen 8 appears in the front hallway and begins to chase them.