Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Assembly	Upgrade a tower two times.
Boardgame	A full board of tiles.
Champion	Three stars in every level.
Close Call	Win a level with one health left.
Dangerous Wildlife	Beat Level 16-25.
Defender	Kill 1000 enemies.
Endless 10	Beat Endless Level 10.
Endless 20	Beat Endless Level 20.
Endless 30	Beat Endless Level 30.
Green Orc Boss	Beat Green Orc Boss.
Green Spider Boss	Beat Green Spider Boss.
Magic Observatory	Beat Level 26-30.
Master	Get three stars in any level.
Merchant	Sell 20 tower.
Monster Plant Boss	Beat Monster Plant Boss.
Necromant Boss	Beat Necromant Boss.
Orc Cave	Beat Level 6-15.
Pickaxe	Destroy five rocks in a level.
Red Orc Boss	Beat Red Orc Boss.
Shielded	Have ten shield.
Skeleton Boss	Beat Skeleton Boss.
Skeleton Tower	Beat Level 1-5.
Warrior Boss	Beat Warrior Boss.