Ani-Mayhem is an out-of-print anime-based collectible card game first released in 1996 in the wake of the CCG boom created by the popularity of Magic: The Gathering.

Produced by the merchandising arm of Pioneer Animation (now known as Geneon) and published by Upper Deck Company, Ani-Mayhem's cards featured images from a variety of anime series and movies.

If you were to print out all the card errata, it would be at least three-to-four times as long as the game's rulebook.

Another problem that hurt the game came in the wake of the Dragon Ball Z expansion.

[citation needed] Upper Deck Company tried this multi-property approach again five years later, creating the VS System, which proved to be more successful.