In a kind of related way an old friend of mine left school at 14 to work at porting arcade games to Amstrads, Spectrums, C64s, AtariSTs, Amigas etc.
He found a lot of the games he had written for long dead companies on various sites, downloaded them and released them for free on his own site. His line of thinking was that if anyone still had claim over the copyright it was him.
I once asked him how to complete some game or another as 12 year old me could never manage to beat the final boss. His response was "its impossible.". 12 year old me could have strangled him.