I based my ranking mostly on originality and creativity because those two things are the hardest things to do. You can always make a wheel roll better. But how many people can invent things like wheels? How many are talented enough to create something out of nothing? So if a game comes along like say, Minecraft or SMB1, where a person picks it up for the first time and feels like they're experiencing something they've never experienced before, and it's good to boot? Those are the greatest games, imo. They get the highest rankings.