So apparently it looks like gog.com is deciding to go negotiate licensing deals behind the scenes for expired licenses for video games.
First that comes to mind is Legend Entertainment who with gog.com released Death Gate, but this isn't about Death Gate its about their other licensed video games.
Next is the Titanic: Adventure out of Time video game.
That means gog.com should negotiate a indefinite deal with 2K and Take-Two to license the music removed from Mafia ask the original music producers whatever company owns it to get a deal for the musics license to add the music back into Mafia.
Next is James Cameron I heard he gets all of his rights to The Terminator back in 2019, so gog.com can talk to him to be able to release all of The Terminator video games released for sale again.
Next is with No One Lives Forever, Activision and whoever else has the licenses and don't want to look at gog.com will possibly eventually go to everyone to find their licenses and put them all together.
Source: Not official information from gog.com, but they are starting to do it behind the scenes now.
Take this with what you want, but this is just the beginning.
Maybe gog.com and CD Projekt RED now have enough money, especially since they are now worth over $3 billion dollars (USD) on the stock market to have leverage to negotiate deals with licensors?
You are confusing licenses. They are neither a singular type, nor something that belongs to a single company.