Climbcrag Castle is a location in the Sixth Dimension, appearing mainly in the video games.

Climbcrag Castle. The far wall visible has the door to the Drab Dungeons added in the Playstation 2 version of the video game.
Overview
Fire Foat Moat

Fire Fort Moat
Seemingly based at the top of a volcano and surrounded by lava.
Residents
Drab Dungeon
Appears only within the Playstation 2 version of the video game.
Residents
Tumble Down Tower

Tumble Down Tower
Residents
Boss
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Random Virus | Ace Lightning's old friend, a cyborg, and a Lightning Knight. He suffers from multiple personality disorder. He appears as a boss on top of Tumbledown Tower's highest tower, capable of projecting fireballs from his left wrist cannon. |
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History
Climbcrag Castle's history is unknown. However, it appears to be connected to the Carnival of Doom and is used by Lord Fear, and the residents seemingly being loyal to him. Ace arrives in the castle during his battle against the Carnival whilst looking for the Amulet of Zoar. Here, he runs into Lord Fear and Random, who has been corrupted to his evil side. Ace pursues Random through the castle until he confronts him on the roof of Tumbledown Tower. Struggling to control his conflicting minds, Random asks which voice should he listen too. His evil side takes control again and battles Ace, but is defeated when reflected lightning bolts shortcircuit him. He is awakened, his good side in control. He gives Ace his piece of the Amulet and tells him to flee before his evil slowly side returns. The castle's fate is left undetermined after this event.
Trivia
- For the Playstation 2 version of the video game, the Drab Dungeons level was added in, along with two new enemies.
- There are several hints that dragons exist in the Sixth Dimension, or at least in the castle. An image of a dragon appears on the booth entrance at the Carnival of Doom, and in Drab Dungeon, a large dragon-like structure appears.