League of Legends launched in 2009 and its matchmaking queue became a daily ritual for millions of players. When enough players are found, the client plays this alert and shows an accept prompt, a moment streamers often capture because declining or missing it restarts the wait. As League clips spread across YouTube, Twitch and Discord communities, the sound escaped the client and became shorthand for a game being ready. Players still recognise it instantly, even in unrelated edits, which is why creators borrow it for ready checks and surprise invites.