Orcs Must Die! Unchained is a fast-paced Fortress Siege action game in which teams of heroes battle head-to-head to attack and defend ancient strongholds. For the first time in Orcs Must Die!, teams of players are responsible for both sides of the battle — building traps to stop the enemy assault AND summoning their own armies to lead against the enemy defense.
Orcs Must Die! Unchained is set in the familiar world of its humorous fantasy predecessors, years after the finale of Orcs Must Die! 2. With the discovery of dozens of new rifts and magical worlds beyond them, heroes have come from far and wide to wage all-out war for control of these valuable gateways. In the years since Orcs Must Die! 2, the War Mage and Sorceress have rebuilt the once-mighty Order. Their new enemy, the Unchained, is not the mindless horde defeated twice before, but instead an organized army led by powerful heroes.