T-Rex in Steal An Egg

Secret · wiki data synced Oct 24, 2026

T-Rex is a Secret pet that earns $25M/s at its base size of 7,500 kg. It hatches from eggs stolen in Prehistoric, where about 1 in 101 eggs is a T-Rex egg (0.991743%).

It is #104 of 236 pets by base income, and #3 of 8 in Prehistoric.

Rarity: Secret
Base income: $25M/s
Base size: 7,500 kg
Zone: Prehistoric
Speed needed: 17M – 18M
Egg: T-Rex Egg
Drop chance: 0.99% (1 in 101)
Grow time: 2h 30m
Reward: +420k Speed, $2.5b

How to get T-Rex

Train until you have at least 17M – 18M Speed, then go to Prehistoric, zone 8 of 14, guarded by the T-Rex. Steal eggs there and bring them back to your base to hatch.

Each egg that spawns in Prehistoric has a 0.991743% chance to be a T-Rex Egg. That means you need to see about 70 eggs for a 50% chance of at least one, and 232 eggs for 90%.

A T-Rex egg takes 2h 30m to hatch, and the wiki lists its reward as +420k Speed, $2.5b.

T-Rex value by size and mutation

Income grows with weight but slows down past 125× the base size. These are the wiki's formula at three sizes:

Size	Normal	Golden ×2.5	Rainbow ×3.5
7,500 kg (base)	$25M/s	$62.5M/s	$87.5M/s
75,000 kg	$103M/s	$259M/s	$362M/s
750,000 kg	$428M/s	$1.07B/s	$1.5B/s

Work out your own T-Rex: open it in the income calculator. All multipliers are on the mutations page.

How T-Rex compares

By base income T-Rex is #104 of 236 overall and #33 of 41 Secret pets. Just above it: Spiderpig ($25M/s); just below: Shadow Dragon ($25M/s).

Other pets in Prehistoric

Pet	Rarity	Base $/s	Drop chance
Dodo	Rare	$280/s	39.1%
Pterodactyl	Legendary	$22K/s	26%
Ankylosaurus	Mythic	$120K/s	20.8%
Bronto	Cosmic	$1.5M/s	7%
Triceratops	Cosmic	$1.2M/s	4.93%
T-Rex	Secret	$25M/s	0.99% (1 in 101)
Tralaledon	Secret	$32M/s	0.83% (1 in 121)
Mosasaurus	Eternal	$180M/s	0.31% (1 in 321)

Source: T-Rex on the Steal An Egg Wiki (CC BY-SA). First listed on the wiki Sep 4, 2026, during the Monsters Are Coming week. Synced Oct 24, 2026.