I'm to lazy to explain the following statement, but still. Undertale copied Cave Story. ...Well I'll do a little. The Dreemurrs - The Mimiga Ballos - Sans A nearly mute protagonist: Quote - Frisk / Chara Cave Story - 2004 (Original PC release) Undertale - 2015 (Original PC release) 11 year difference. One came before the other. One's much better. One is Cave Story.