Undead Citadel achievements

Kill an enemy at 30m

Finish level "Inner walls" (9)

Finish level "The Maze" (8)

Kill 100 undead enemies

Cut off the limbs of an enemy while still alive

Survive for more than 30 waves in the Horde mode

Kill 3 enemies with a single explosive

Take an arrow fired by the enemy in mid-air

Freeze 100 enemies

Achieve all the achievements

Survive for more than 20 waves in the Horde mode

Kill 10 crows