Undertale
Fox developed almost the whole game by himself. He wrote the words and made the music by himself, and only used a few pieces of extra art given to him by other artists. The game was inspired by the Mother and Mario & Luigi role-playing series, the "bullet hell" shooter series Touhou Project, and the British comedy show Mr. Bean. Undertale was originally meant to be two hours long and released in mid-2014, but creating the game took over three years, making the story longer and not making the game available until much later.