Iron Sea Defenders

Builder

Build 50 towers

Cannoneer

Kill 1000 enemies

Secret weapon

Kill 500 enemies with the secret weapon

Seller

Sell 50 towers

Furious

Launch 100 waves on one map manually

Head Hunter

Get 100 000 coins

Fortune's favorite

Complete level when your castle has 1 HP

Engineer

Build 1000 towers

Commander-in-Chief

Kill 50 000 enemies

Heavy artillery

Fully upgrade 200 towers

Capitalist

Sell 500 towers

Admiral

Complete all levels with 3 stars