> Apparently 'Ali Baba and 40 Thieves' which claims to be a 1982 Sega game is full of
> code lifted straight from Pacman with various hacks applied.
> I haven't verified that myself, but, you know...
> there's still a bit of a mystery surrounding the protection on that one too.
True, but by the same token it's not uncommon for bootlegs / hacks to leave in the original manufacturer's copyright notices - and there are a couple of cases where copyright has been deliberately misattributed.
WRT Ali Baba and the 40 Thieves, it wouldn't surprise me to find that it was a straight-up hack of Pac-Man with misattributed copyright. In the absence of flyers, etc. to back up its origins and knowing that even PCBs (particularly those from Nintendo and Namco / Midway) were produced with bootleg copyrights on them, it's at least a possibility.