[Angrist]

Mark Twain his books are more than a 100 years old, so there's no copyright on them anymore. The man would probably be flattered to know that people these days still read his books.
Computer games are less than 30 years old, so there's copyright. Most of the creators are still alive and are trying to make a living. If what they made back then is still popular now, I don't see how they should just give them away.

It seems like you're ignoring arguments concerning law and you're trying to come up with moral arguments. That's fine, I'm not trying to stop you pirate things. I just want to give some arguments for the other side.