Team Fortress 2 launched in 2007 as Valve's class-based team shooter, and the Spy was built around deception, using his disguise kit to pass as an enemy while lining up backstabs. Clips of his tricks spread early through machinima, Garry's Mod videos and YouTube edits, where the disguise puff became shorthand for infiltration. It still sits alongside shooter staples like enemy spotted in soundboards and meme edits because players instantly recognise its sneaky, pretend-to-be-someone-else meaning without needing any dialogue or explanation.