Undead Citadel achievements

Finish level "Graveyard" (6)

Finish level "Catacombs" (7)

Kill 100 undead enemies

Cut off the limbs of an enemy while still alive

Kill 1000 undead enemies

Survive for more than 30 waves in the Horde mode

Kill 3 enemies with a single explosive

Achieve all the achievements

Take an arrow fired by the enemy in mid-air

Freeze 100 enemies

Survive for more than 20 waves in the Horde mode

Kill 10 crows