Stop Killing Games

But it's less obvious to me how the legislation should work for a multiplayer-only game that goes out of business. I suppose it should require a refund at some point. But at what point?

Steam only lets you refund a game that you played for less than two hours.

And if you think that's not long enough, there's surely some time period where you can agree that you've got your money's worth. Kind of like how you lose the ability to say "I didn't like it" after you ate your whole dinner at a restaurant.

Yet in the comments here someone gives an example of three years of online support which is insane. Why is multiplayer special? Should Steam also let you refund any game until three years elapse?

The idea is to force the companies to provide an end-of-life plan that leaves the game in a "reasonably playable state". Depending on the game the approach can differ. Releasing the binaries along with instructions for hosting dedicated servers is one approach (that some games already take). I was playing on a (pirated, but it was a long way ago and I was a child) Lineage 2 server way back in 2007 on my local ISP network, so even something like MMORPGs can be covered if it's included in the discussion at the design stage of the game.

But even if the backend is very complex and vendor-locked, releasing something like a set of Cloudformation templates and saying "you can only host this on AWS and it's going to be restrictively expensive but there you go" is also an option that would satisfy the requirements. It's still better then having nothing at all to dig at (although some fans still do reverse-engineer and spin up community servers even without having access to any of this).

If you buy something, that will be yours, you can use it as long as you want, you can sold it or it can be inherited from you. (In copyright terms that's a perpetual, irrevocable license.)

If there is only a limited duration you can use something, that's called renting and the duration must be known before you enter into a contract.