These companies care about their "property" more than about legality, unfortunately. I remember a lawyer from Atari/Infogrames coming at me for having authoris

These companies care about their "property" more than about legality, unfortunately. I remember a lawyer from Atari/Infogrames coming at me for having authorised some abandonware site to publish a game I had written in 1990, Alpha Waves. So I dug up the contract I had signed with them. It was a 3 years exclusive licensing and distribution contract, which Infogrames could only renew by sending me royalties every quarter. I sent a copy of the contract, along with a letter asking for the more 15 years of royalties (after 1993). Never heard back from the lawyer after that. Old abandonware often belongs to individuals and independent authors. And if they are like me, unlike lawyers, they are just happy that someone remembers the stuff they sweated on for years.