Black Mesa is a game made by a private team of modders. It is a full remake of Half-Life, an IP not owned by the BM team, but by Valve.
I had an egging curiosity about how fan-made remakes are received by IP owners. BM is only allowed to exist because Valve decided to leave it be, they’re cool like that. But how would other IP owners respond to groups of fans remaking their old classics? What if some skilled fansstarted to remake the early Thief games or something? Would Square Enix sue them for every dollar they have, or benevolently let it happen as Valve has?