Rainbow Six Siege is Ubisoft's tactical shooter released in 2015, and the you're being tracked warning is tied to Jackal, the attacker introduced in 2017 whose Eyenox device scans and pings defender footprints in real time. Defenders who receive the ping must move or risk being hunted down, which made the alert instantly memorable to players. Clips of the sound later spread beyond Siege montages on TikTok and YouTube, where creators reuse the ultra-short notification as a universal enemy spotted signal for anyone who has been followed or caught.