Everybody needs sleep. Your body can't recharge and function properly without it. So naturally, humanity has invested all of itself into technology that actively mucks with our sleep processes. Any regular gamer will have several stories of staying up all night playing their favorite games, but it isn't just because the light from the screen messed with their brain chemistry. Here are some games that are so well-designed for engagement that it's hard to put them down ever, even for oh so precious sleep.