another repost of a link for the sake of easy retrieval: an anecdote from one of the leads on Sega's Mega Drive adaptation of the sumo manga Aa Harimanada!, a game that was notorious in its day for bearing very little resemblance to the source material (a relatively stoic sumo drama, presented in game form with all sorts of Street Fighter-esque hyper-real moves) and infamous years later for its silly credits animation, which blew up on NND in the mid-'00s.
The author has edited and/or deleted and republished this article a couple times now and seems particularly annoyed at news sites and aggregators for spreading it everywhere, so I'll refrain from mentioning the specific names of the people mentioned in the original version of their post, but the gist of the story is that the game was very nearly not made due to the actions of some grifter who claimed to be [redacted famous game developer], got chummy with the head of the dev studio, wormed their way into a director's spot and then fucked up production via a series of extremely amateur mistakes, forcing the author to basically lock them out of the project in order to right the ship and get the game done, and it wasn't until months later, when another member of the team happened upon a photo of [redacted famous game developer] in a game magazine, that they realised that jackass was completely full of shit the entire time.