When I think about retro games, forget Mario, Sonic or even Tetris. I think Zork. The quirky text adventure, published by Personal Software (and then Infocom) back in 1980, screwed with players in many, many ways (when it wasn't sending grues after them). I thought I knew its best secrets -- that is until prominent developer Ryan C. Gordon‏ revealed the granddaddy of them all... and the most underhanded use of randomness I've seen in a game for a while.