Rift Sacrifice
A Rift in the lobby asks for 3 random pets and gives 1 Rift Egg (Update 3).
The map is one long run: your base sits at the start and every biome is further out than the one before it. Here is the route in order with the Speed you need, what guards each biome and the hidden spots worth knowing.
Not to scale: the route shows the order you reach each biome. ★ = hidden spot (listed below). Tap a biome for its Index page.
A Rift in the lobby asks for 3 random pets and gives 1 Rift Egg (Update 3).
Pyramids are scattered through the Desert.
One of the two hidden parts for the Stolen Experiment Vault.
On the left-hand wall. Nibbles (Experiment #013) hides here and starts the vault quest.
Behind a bush near the T-Rex.
Bring a Crane to the old tree to wake it up. The incubator gave Bloom and Spirit Bloom during the Cherry Blossom event (not active now).
Behind the waterfall opposite the right-hand gate. Fuses Light and Darkness pets.
What is the order of biomes in Steal An Egg?
Forest, then Lake, then Desert, then Jungle, then Snow, then Volcano, then Abyss Ocean, then Prehistoric, then Cosmic, then Cherry Blossom, then Titan Temple, then Angels & Demons, then Enchanted Forest.
Where are the secret spots in Steal An Egg?
Rift Sacrifice: Lobby; Pyramid: Desert; Lost Part #1: Volcano; Dr. Scramble's cave: Abyss Ocean; Lost Part #2: Prehistoric; Sakura tree and incubator: Cherry Blossom; Secret Fusion Shrine: Angels & Demons.
Where is Dr. Scramble's cave?
On the left-hand wall. Nibbles (Experiment #013) hides here and starts the vault quest.
What is the furthest biome in Steal An Egg?
Enchanted Forest, which needs 50B Speed.
Sources: Steal An Egg Fandom wiki: Biomes · Steal An Egg Fandom wiki: Zones · Steal An Egg Fandom wiki: Dr. Scramble Event · Steal An Egg Fandom wiki: Boosts · Steal An Egg Fandom wiki: Updates. Written in our own words.