The clip comes from Counter-Strike: Global Offensive, Valve's tactical first-person shooter released in 2012, where short voice lines and radio callouts are part of team play. 'Let's go' is a familiar rallying call used to push teammates forward before a rush or after a won round. As CSGO grew into one of the most watched esports on Twitch and YouTube, its short voice moments spread into montages, memes and soundboards alongside other in-game callouts like the bomb has been planted alert and the enemy spotted warning. Its short length and clear energy keep it useful for quick edits.