Biomes are the steal zones in Steal an Egg. Each one has a named guardian and a Speed gate that decides whether you can even walk in. Compare those two facts before you pick the next nest, because unlocking a zone just means the guardian there is now your problem.
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Group
Biomes
Forest
The starter biome where every new player begins: free-roaming chickens, no speed gate, and the common eggs that fund your first treadmill upgrades.
- Guardian
- Chicken
- Speed required
- No requirement
Lake
The first real gate. Swans patrol the shoreline nests, and the 900 speed floor is low enough that a few treadmill sessions open it.
- Guardian
- Swan
- Speed required
- 900
Desert
Scorpions guard the desert clutches. The tenfold speed jump from Lake is the game's first real grind wall.
- Guardian
- Scorpion
- Speed required
- 10,000
Jungle
Tigers are fast and unforgiving, and the jungle's better egg tiers start justifying mutation hunting.
- Guardian
- Tiger
- Speed required
- 40,000
Snow
The yeti hits hard and the speed floor sits at 170,000. Mid-game pets from here carry noticeably better income.
- Guardian
- Yeti
- Speed required
- 170,000
Volcano
Hellhounds chase across open lava fields. This is where escape speed starts mattering more than entry speed.
- Guardian
- Hellhound
- Speed required
- 700,000
Abyss Ocean
Moby rules the deep. The abyss holds late-game eggs and punishes anyone carrying a heavy egg at the speed floor.
- Guardian
- Moby
- Speed required
- 2.5 million
Prehistoric
A T-Rex guards dinosaur-era nests. Only well-developed accounts outrun it with an egg in hand.
- Guardian
- T-Rex
- Speed required
- 17 million
Cosmic
The endgame biome. The dragon guards the rarest eggs in the game behind a 700 million speed wall.
- Guardian
- Dragon
- Speed required
- 700 million
| Name | Description | Guardian | Speed required |
|---|---|---|---|
| Forest | The starter biome where every new player begins: free-roaming chickens, no speed gate, and the common eggs that fund your first treadmill upgrades. | Chicken | No requirement |
| Lake | The first real gate. Swans patrol the shoreline nests, and the 900 speed floor is low enough that a few treadmill sessions open it. | Swan | 900 |
| Desert | Scorpions guard the desert clutches. The tenfold speed jump from Lake is the game's first real grind wall. | Scorpion | 10,000 |
| Jungle | Tigers are fast and unforgiving, and the jungle's better egg tiers start justifying mutation hunting. | Tiger | 40,000 |
| Snow | The yeti hits hard and the speed floor sits at 170,000. Mid-game pets from here carry noticeably better income. | Yeti | 170,000 |
| Volcano | Hellhounds chase across open lava fields. This is where escape speed starts mattering more than entry speed. | Hellhound | 700,000 |
| Abyss Ocean | Moby rules the deep. The abyss holds late-game eggs and punishes anyone carrying a heavy egg at the speed floor. | Moby | 2.5 million |
| Prehistoric | A T-Rex guards dinosaur-era nests. Only well-developed accounts outrun it with an egg in hand. | T-Rex | 17 million |
| Cosmic | The endgame biome. The dragon guards the rarest eggs in the game behind a 700 million speed wall. | Dragon | 700 million |
How to progress through biomes
You train Speed on the treadmill in your base. Hit a biome's listed number and that zone opens. Forest has no gate, so the first eggs you steal there pay for those early sessions.
A heavier egg still makes you slower on the way home, and the guardian is still hunting. Walk in at the floor and grab a big nest, and you'll often drop it before the pen. Train a little past the gate before you treat a new biome as farming ground.
Lake comes quickly. Desert is the first stall, because the Speed jump is huge and Forest eggs still feel easy.
Stay in the loop: steal, hatch, train, then take the next gate. Each later biome charges more Speed than the last, and the rarest eggs sit at the far end.
You don't need Cosmic on day one. Farm the highest biome you can leave with an egg, then train for the next one. From Volcano onward, the getaway is the real test. Open ground, meaner guardians, and late-game eggs all punish anyone who only packed the entry number.
Common mistakes
- Walking in at the exact Speed floor and grabbing a heavy egg
- Skipping treadmill time because Forest still has nests
- Treating a newly unlocked biome as safe just because you can enter it
- Sprinting for Cosmic before you can consistently escape the zones before it
FAQ
Which biome has no Speed requirement?
Forest. You start there, and Chicken is the guardian. Early eggs from Forest pay for the first treadmill sessions.
Is the listed Speed enough to steal an egg?
It is enough to enter. It is not a promise you can outrun the guardian with an egg, especially a heavy one. Train past the floor before you farm there.
How do I reach later biomes?
Train Speed on the treadmill. Each biome after Forest has a Speed floor. Hit that number and the zone opens. Steal, hatch, and train again for the next gate.
Can I find rare eggs before Cosmic?
Cosmic is where the rarest eggs sit, behind the Dragon and the 700 million Speed wall. Some limited eggs can still spawn in a random egg in earlier biomes, so earlier zones can still surprise you.
What is the endgame biome in Steal an Egg?
Cosmic. It needs 700 million Speed to enter, and the Dragon guards the rarest eggs. Treat that as a late target, not a first-session goal.
