TGC writes: “What is the difference between a man and a parasite?” So intones Andrew Ryan, chief objectionist of 2007s smash Bioshock. Not the sort of line commonly espoused by the many denizens of our virtual kingdom. And yet philosophical ideology crops up in video games far more than you might have thought. If you really did just think that. And weren’t merely emulating the metaphysical echoes of another man’s thoughts. Below we consider five popular video games that have asked more of us than merely kill this, kill that – ambitious and deep-thinking games.