Orcs Must Die! is a tower-defense game where you, as the War Mage, need to protect the world from the hordes of evil creatures such as Orcs and Ogres. To complete your mission, you need to keep enemies out from magical Rifts that must not be destroyed. Every level features from four to twelve waves; each Orc that reaches your Rift damages it a little. Once the Rift Score is 0, you need to start the level over.   The title uses a third-person perspective that makes it look like a classic action g...