One egg per animal
Every animal lays its own egg, with its own shape. Here are the eggs of each biome, in corridor order, then the special eggs.
The countdown on your egg and the biome you stole it from are enough to find its pet and how much it will make.
In the nests, the same egg shows up in several sizes. The bigger it is, the more the pet inside makes, but the heavier it is to carry: you run slower and the guardian catches you more easily. An egg's color says nothing about its value: its shape tells you the pet.
Nest eggs respawn every 5 minutes.
Not in the nests: Equinox and Aetheron are made by fusion at the secret shrine.
Not in the nests: Spirit World Guardian are made by fusion at the secret shrine.
Limited egg: it never spawns in the corridor nests. You get it from the shop or during events like Admin Abuse (live events where the game's creators hand out bonuses).
Sold for Robux in the shop from Update 2 until Update 4, when the Luminous Egg replaced it. Each monster had a rare Mecha version.
The rare Mecha versions of the Monster Egg monsters.
It replaced the Monster Egg in Update 4. Each hatch has a 1% chance to give the pet's Luminous version.
Limited-time egg from Update 6, sold for Robux in the shop until October 10, 2026 (from 99 Robux). It holds 6 extinct animals, and each hatch has a 1% chance to give their Skeletal version, which makes far more.
Chances: Glyptodon 39%, Terrorbird 24%, Giant Sloth 18%, Dunkleosteus 11%, Gigantus 6.5%, Sabertooth 0.5%, and 1% for a Skeletal version.
Egg from Dr. Scramble's Lab (Update 6), Biohazard Pets banner: put in the 3 requested eggs while this banner is active. Dr. Scramble's Mech also gives one from your first win, as a mastery reward.
Egg from Dr. Scramble's Lab (Update 6), Experimental Pets banner. Chances checked in the game: from 45% for the Wheel Hamster to 0.5% for the Dreadstinger.
Egg from Dr. Scramble's Lab (Update 6), Unstable DNA banner, the rarest one (22% of the time). It is the only one with a Divine pet, the Octophant. Boss mastery gives a Scrambled version at 90 wins.
Until Update 6, the lobby Rift asked for 3 random pets: you sacrificed them to get a Rift egg. Three banners (Riftborn, Riftbeasts, Shattered Rift) rotated about every 3 hours. Dr. Scramble's Lab replaced it.
Dragons and other limited pets: events, Admin Abuse and, since Update 6, rewards from Dr. Scramble's Mech.
Fusion partners
All pets
Biomes
Mutations
Tier list
Guide
Updates
Secrets
Index & bats
Game passes
Avoid scams