Undertale is an indie role-playing game released in 2015 and created by Toby Fox, known for its turn-based combat where players attack enemies with timed strikes. The slash effect plays during those attack animations and became familiar through playthroughs, fan animations and remakes shared online. Because the sound is short, clean and strongly tied to a successful hit, creators reuse it outside the game for parodies, fan projects and meme edits that need a recognisable game attack cue without any dialogue or music attached.