Base Upgrades

The base in Steal An Egg has four upgradeable components: treadmill, hatching area, pet capacity, and defense. The treadmill is always first.

BCommon

Treadmill Level 1-5

Cost 50–500 coins. +2 Speed per level. Biome 1 unlock.

RoleSpeed training

TypeTreadmill

ObtainIn-game shop

Best ForFirst priority

AUncommon

Treadmill Level 6-10

Cost 600–2,000 coins. +3 Speed per level. Desert biome unlock.

RoleMid-game training

TypeTreadmill

ObtainIn-game shop

Best ForSpeed 25-50

SRare

Treadmill Level 11-15

Cost 2,500–8,000 coins. +4 Speed per level. Snow biome unlock.

RoleLate-game training

TypeTreadmill

ObtainIn-game shop

Best ForSpeed 50-75

SLegendary

Treadmill Level 16-20

Cost 9,000–25,000 coins. +5 Speed per level. Storm Peaks unlock.

RoleEnd-game training

TypeTreadmill

ObtainIn-game shop

Best ForSpeed 100+

SMulti

Base Tier 1-5

Tier 1 = 1,000 coins for 1.5x. Tier 5 = 25,000 coins for 4x. +50 eggs storage per tier.

RolePassive income

TypeBase

ObtainBase upgrade NPC

Best ForPassive multiplier

ACommon

Defense Walls Lv 1-2

Wall Lv1 slows intruders by 20%. Wall Lv2 slows by 40%. Cheap deterrence.

RoleAnti-raid

TypeDefense

ObtainIn-game shop

Best ForSlowing intruders

BUncommon

Alarm System

Alerts you to intruders. Medium cost. Combine with walls for best defense.

RoleEarly warning

TypeDefense

ObtainIn-game shop

Best ForAnti-raid

SRare

Guard Turret

Damages intruders. High cost but the only active defense. Stacks with walls.

RoleAnti-raid

TypeDefense

ObtainIn-game shop

Best ForActive defense

Data Quality Notes

Keep entries useful by separating source-backed facts, player-tested strategy, and update timing.

Source fields

Keep rarity, obtain method, abilities, and summary tied to official posts or repeatable in-game testing.

Internal links

Link base entries to matching builds, boss routes, and guide sections.

Update rhythm

Keep tier values and obtain methods current after each game update.