The line comes from Valve's Portal 2, released in 2011, where Ellen McLain voices both GLaDOS and the sentry turrets, the chirpy little gun robots whose quotes include 'I see you', 'Hello?' and 'Target lost'. The turrets first appeared in the original Portal in 2007, but Portal 2 gave them far more dialogue and screen time. Clips of their polite threats spread through YouTube gameplay videos, Garry's Mod animations and later TikTok edits, where the phrase became shorthand for the exact moment someone gets spotted doing something they should not.
About this sound
The Portal 2 turret's flat monotone voice saying 'I see you.' A famous Valve line used for spotting gags, jumpscare setups and caught-in-the-act meme edits.
A robotic female voice, calm and almost cheerful, says 'I see you' in a flat, even tone with a faint metallic echo. It is the Portal 2 sentry turret, a little white-and-red gun bot voiced by Ellen McLain, spotting the player after a few seconds of searching. The creepiness comes from the contrast: the voice sounds polite and childlike while the turret is moments from opening fire. In memes, that mismatch is the whole joke, turning an ordinary 'caught you' moment into something suddenly sinister, funny and instantly recognisable to gamers.
