In my last blog, I talked about the 2 rules of game design: 1) K.I.S.S. and 2) use available resources.
By "using available resources" I really mean "steal"
The game industry is a unique beast. It's not like products or stories where ideas are shielded and using someone's idea will get you a nice visit from "sue". The game industry thrives on the exchange and manipulation of these ideas.
But you say, why are there lawsuits regarding games?
Ideas can certainly be copyrighted, but it's the EXPRESSION of those ideas that people go to court over.