Team Fortress 2 is Valve's class-based multiplayer shooter, first released in 2007, and killstreaks arrived later as a weapon feature that tracks consecutive kills with escalating visual effects. The Two Cities update in 2013 introduced killstreak kits, and ever since, TF2's crisp feedback sounds have been a staple of the game's feel. Short clips like this one circulate widely on soundboards and in meme edits, where creators borrow the game's punchy audio language to celebrate in-game moments or to add arcade-style emphasis to videos that have nothing to do with TF2 at all.