The thing with people and hangman is that names can have awkward spellings, be in different languages, etc. Also it's difficult to have definitive list of what makes a famous person. I guess for scientist you could possibly just pool from Nobel Prize winners? As for video games, would it be individual games (Call of Duty 4 Modern Warfare/Metroid Fusion) or just franchise names (Call of Duty/Metroid)? I also thought plays might be a bit obscure, so probably best to just forget about them.