Could it be a copyright troll?

There’s a lot of that happening. People claiming to represent a company and actually having nothing to do with them, issuing takedowns.

Vimm's Lair has been asked to remove many games from The Vault on behalf of Nintendo, Sega, Lego, and the ESA. While most of these games (and the hardware to play them) haven't been sold in decades, ultimately it's their prerogative so these games are now gone for good.