TL;DR: the way it was supposed to work is that entities that wanted limited liability were granted corporate charters in exchange for providing some large, tangible public benefit (and very much not just “shareholder value”, BTW). This post-Dodge v. Ford Motor Co. world where corporations are essentially mandated to be sociopathic is an absolute 100% perversion of what incorporation was meant to be for!
The top DDG search result for that (on crazygames . com) looks like a rip-off or something. I’m going to assume the thing you mean to recommend is MineClone2, a mod for MineTest, which is the most prominent Free Software Minecraft-style game.
The cost of producing something doesn’t change depending on who you sell it to. Charging anything beyond cost + some reasonable profit margin is unethical profiteering.
Sure, in the same way it’s the government’s “fault” for removing your option to, say, run a protection racket, or agree to a contract of indentured servitude, or sell baby formula with melamine in it. There are lots of abusive or exploitative business models that the government removes your option to engage in! And the government is right to do it.