I think it's important to add that regardless of whether proprietary games are wrong, he points to two initiatives (Liberated Pixel Cup and the LibrePlanet Gaming Collective) that are promoting and developing free games. Those are worthy of support even by people who many not be convinced that all games should be free. Personally, I think they should be -- games can have backdoors and antifeatures like any other program. They can be used to control the user. Game code is also re-usable in contexts that aren't games, and it has educational value. It has all the problems that locking away knowledge usually does. Game companies have also been some of the most aggressive when it comes to trying to control users.