Stealaneggs The Prehistoric biome in Steal An Egg has a speed requirement of 18M (18,000,000) — the Speed you need to carry an egg home ahead of its guardian. Its guardian is the T-Rex. The previous biome is Abyss Ocean. After Prehistoric, the next biome is Cosmic at 700M. See the full unlock order.
Time to reach Prehistoric
Already inside Prehistoric and waiting for a rare egg? Log what you see to estimate the next spawn window.
Prehistoric pets and base income
8 pets hatch from Prehistoric eggs. Plug any of them into the value calculator to add size and mutation bonuses, or see all Eternal pets.
| Mosasaurus | Eternal | $180M/s |
| Tralaledon | Secret | $32M/s |
| T-Rex | Secret | $25M/s |
| Bronto | Cosmic | $1.5M/s |
| Triceratops | Cosmic | $1.2M/s |
| Ankylosaurus | Mythic | $120K/s |
| Pterodactyl | Legendary | $22K/s |
| Dodo | Rare | $280/s |