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Not Hatchable
This egg was only in the game during an event and can no longer be hatched, so the pets it contained are limited. The pets can still be obtained by trading with other players.


The Backrooms Nightmare Egg is a Backrooms egg in Pet Simulator 99. This egg is available in 1x, 2x and 3x versions and therefore has slightly higher chances of getting a Huge Pet.

Pets included in the Backrooms Nightmare Egg[]

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