Iron Heart

Builder

Build 50 towers

Cannoneer

Kill 1000 enemies

Secret weapon

Kill 500 enemies with the secret weapon

Trader Assistant

Sell 50 towers

Furious

Launch 100 waves on one map manually

Stingy Warrior

Get 100 000 coins

Lucker

Complete level when your castle has 1 HP

Engineer

Build 1000 towers

Admiral

Kill 50 000 enemies

Armorer

Fully upgrade 200 towers

Trader

Sell 500 towers

Invulnerable

Complete all levels with 3 stars