If you want to play without the fear of having installed a
rootkit/spyware/whatever with the game, you need the source code available.
Besides, even without talking about the source code, the freedom to share the
game with your friends should never be denied. Not to mention games with DRMs
that do not even let the user play as she wants (e.g., forcing her to
authenticate to a remote server to play solo). Video games are not only Art.
As for the cost of developing a game, have you ever wonder what is the
development cost of the Linux kernel, the GCC compiler, the Apache server,
the Firefox Web browser, the LibreOffice suite, etc?
We have already told you those things tens of times. You just disregard them
without any single argument. You are a troll.