Undertale is an indie role-playing game created by Toby Fox and released in 2015, known for its distinctive battle system and memorable sound design. The damage sound plays during encounters whenever the player or an enemy is struck, making it instantly familiar to anyone who played the game. As Undertale grew into a lasting internet favourite, clips of its battle effects spread through gameplay videos, memes, and soundboards, alongside other short game sounds like the Roblox oof. Creators still use the short hit today because it immediately reads as video-game damage, even for viewers who have never played Undertale.