The Dexatorium is the "ultimate" gaming arena built by Dexter which holds larger-scale and more difficult versions of well known board games. However all of the games in the arena are designed to allow for Dexter to always come out the winner, making the Dexatorium quite unfair. It appeared in the episode "Game for a Game" where Dexter made it to finally beat Dee Dee at something, however in the end his own egotistical desire to defeat Dee Dee resulted in him destroying the Dexatorium along with the rest of his lab.


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