Steal an Egg Base Upgrades: Levels, Prices and Slots

12 BASE STATES · 7 TO 18 ACTIVE PETS

Every base upgrade, price and active pet slot

See all 12 configured base states, from level 0 to level 11, and plan when another active pet slot is worth the price.

Starting base00

Price to reach level: Starting level
Maximum active pets: 7
Extra slots: —

No new slot01

Price to reach level: $1K
Maximum active pets: 7
Extra slots: +0

Two-slot jump02

Price to reach level: $1M
Maximum active pets: 9
Extra slots: +2

Base level 303

Price to reach level: $75M
Maximum active pets: 10
Extra slots: +1

Base level 404

Price to reach level: $500M
Maximum active pets: 11
Extra slots: +1

Base level 505

Price to reach level: $1B
Maximum active pets: 12
Extra slots: +1

Base level 606

Price to reach level: $50B
Maximum active pets: 13
Extra slots: +1

Base level 707

Price to reach level: $500B
Maximum active pets: 14
Extra slots: +1

Base level 808

Price to reach level: $1T
Maximum active pets: 15
Extra slots: +1

Base level 909

Price to reach level: $25T
Maximum active pets: 16
Extra slots: +1

Base level 1010

Price to reach level: $100T
Maximum active pets: 17
Extra slots: +1

Maximum level11

Price to reach level: $500T
Maximum active pets: 18
Extra slots: +1

What the Active counter means

In 11/11 Active, the first number is how many pets are equipped and the second is the current capacity. Buying +1 Equip increases capacity; it does not directly improve one pet's income, weight or mutation multiplier.

Offline growth and income

Eggs keep growing and active pets keep earning while you are offline, but the source reports that offline income is substantially lower than staying in the game. The exact percentage, cap and growth-rate rules are not verified.

Base slot or Speed upgrade?

Buy a base level when another strong pet will meaningfully raise total income. Buy a treadmill or Trail when Speed is blocking access to the next biome. Level 1 is required for progression but keeps the same seven-slot capacity.

Compare treadmills →Compare Trails →

Why this guide uses a slot diagram

Only the ordinary starting base has a verified photograph in the source. Upgraded base appearances are not verified, so this page avoids invented or mismatched pictures and visualizes the confirmed capacity instead.

Source and verification

Community data reviewed September 24, 2026; source page updated September 11, 2026.

Steal an Egg Wiki — Base upgrades and active pets ↗

Want the next verified discovery?

We publish short findings, tests, and update notes as soon as they are ready.

← Back to all guides