The portal gun, also called the Aperture Science Handheld Portal Device, is the signature tool from Valve's Portal, released in 2007, and its sequel Portal 2 from 2011. Players use it to create linked portals and solve physics puzzles, and its distinctive firing noise quickly became one of the most recognisable sounds in gaming. As Portal clips, speedruns and parodies spread across YouTube and later TikTok, editors began lifting the effect for their own videos. It remains popular because it instantly reads as teleportation, even to viewers who have never played the games.