Undertale is a huge game and one many continue to enjoy today. It took some notes from Earthbound but focuses on giving the player options for progression; do you fight your way through, or do you not harm anyone? It created a very morality-heavy adventure that offered two very different feeling playthrough’s for those that went down both paths.
Today, Toby Fox posted on his twitter various screen shots and notes he took when he was in college, showing an insight on the development process of Undertale before it even hit Kickstarter. These insights are really cool, being a blend of notes and early concept art Toby drew of the game. You can find more examples on his official twitter page, but it’s great learning more about a great game.