Digital technology has come so far that independent video game designers can create and distribute original work online, and they can make their games about whatever they want. Some indie games have become mainstream hits, but Undertale is a phenomenon. Created by Toby Fox, Undertale deconstructs and questions the fundamentals of video games -- while at the same time being really fun to play, and full of unforgettable characters. With Julian Feeld of Existential Gamer and Nathan Grayson of Kotaku.