Mercenaries: Playground of Destruction launched in 2005 for PlayStation 2 and Xbox, developed by Pandemic Studios. Players could choose Chris Jacobs, a former Delta Force soldier, as their playable mercenary in its war torn North Korea setting. His short reaction lines, including this missile lock warning, were built for fast combat moments rather than cutscenes. Clips like this later circulated on soundboards alongside other military callouts such as Enemy Spotted, and the line remains useful because almost any player instantly understands locked on danger from the tone alone.