Those games are an interesting case: it’s very likely Activision or Warner owns the rights for them, but since ownership could be in the hands of at least one other party and the games themselves aren’t popular nowadays, it isn’t financially worth it for them to do the work to verify it, even though people have tried to work with them in the past.

https://kotaku.com/the-sad-story-behind-a-dead-pc-game-that-...