The hitmarker debuted with the Call of Duty series and became iconic in Modern Warfare 2, the 2009 Infinity Ward shooter that defined online multiplayer for a generation. The sharp tick plays every time a bullet connects, with a deeper variant for headshots, giving instant audio feedback in chaotic firefights. YouTubers popularised it through montage and trickshot videos in the early 2010s, and soundboards later lifted it as a standalone clip. It endures because any audience instantly reads the sound as confirmation of a clean hit.