Doom's Day: Judgement (often referred to as DDay: Judgement) is a custom scenario for Warcraft III: The Frozen Throne, based on the "3 Corridors" map. The objective of the scenario is to destroy the opponents' "Castle"/"Black Citadel", a heavily guarded structure in west/east side of the map. Players use powerful heroes and they are assisted by allied heroes and AI-controlled fighters called "creeps". Also players have ability to buy their's own creeps which can be bought in some shops. As in role playing games, players level up their hero and use gold to buy equipment during the mission.