Why would I care?<p>I understand the point of freedom for some software: say if tomorrow the whole nginx team decides to retire and I nginx is a critical part of my business, I have the option of taking over the maintenance.<p>But games are not like that. Games are entertainment and presumably a short-lived one. I play, I get bored, I move on. The games are also a product of diverse teams: it's not just programmers, but story editors, 2D/3D artists, composers, voice artists etc that create experience, not a tool or platform. Do you really want Hemingway's texts be licensed under GFDL so you could improve upon them? Or may be you want to get your hands on petabytes of data that went into production of Avatar so that you could fix a couple of landscapes?