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When the player enters Room 210, they will find themselves in an abandoned factory. It has many rooms, although most of its doors are "broken", rendering those rooms inaccessible. However, there are some that the player can open; inside these rooms are notes about an unspecified group performing rituals to "appease the darkness".
One of the rooms, located in the foggy hallway before the last chamber (Room 212 in HD Renovation), has bloody walls and seems to be reminiscent of a fetus inside an uterus.
At the end of Room 210 (213 in HD Renovation), Specimen 5 walks out from a cell and chases the player for the first time.
In Room 250, the player is sarcastically congratulated by Spooky, who leaves a present for their progress.
The gift box says "Look Behind You". When the player looks back, numerous versions of Specimen 1 appear. There's also the first password plate, which allows the player to start the game in Room 250 from the settings menu, by inputting the password "PUMPKIN".
The rest of the rooms randomly contain the specimens met so far.
"Warm Hands and a Gentle Stab", Room 210's theme:
The "baby" cries heard inside the bloody room:
- Room 210 is heavily based on The Otherworld found in the Silent Hill video game franchise.
- In one of the rooms in Room 210, there is what is believed to be Han Solo from Star Wars trapped in carbonite.