What does RMS think of video games?

Unlockable content is restricted to players who have made certain progress in-game. This is not free as in freedom. If a free, open-source game features unlockable content, is it unethical? Is it infringing on muh freedom?

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However, a proprietary game running on a computer is capable of being as malicious as any other piece of software, so the source must still be open for study whether or not protection from modification is provided by law.
How do you implement anti-cheating, without security-by-obscurity?

Moreover, most games include 3rd party code, like xbox360 sdk, which couldn't be made open - i.e. company profits exactly by selling the code.