We need free software advocates to get a chance to step into this ring. If we could push for a requirement that companies release the source code for their game engines, and public domain them - while still allowing them to retain copyrights of content assets, it absolves them of the responsibility of having to put more work into ensuring the game remains playable, while still giving fans what they need to make it continue to be playable. It also means players would still have to buy the game to play it, unless a total conversion existed.

The main complication with that route would be 3rd party middleware. They could just be exempt from release requirements, but that would place a rather large burden on fans for having to make alternatives to that middleware to make a game playable.