Dr. Hax is a legendary character created by YouTuber DasBoSchitt for the machinima series 'The GMod Idiot Box,' which first gained massive popularity in the late 2000s. Based on a modified Dr. Wallace Breen model from Half-Life 2, Dr. Hax is a hyper-vigilant protector of fair play who possesses the supernatural ability to detect 'hacks' instantly. His signature move involves screaming his catchphrase 'HAX!' before hurling a CRT computer monitor at the offender with lethal force. The character became an iconic staple of Garry's Mod culture and the wider Source Engine community. It is primarily used to mock players who appear to be cheating or to humorously react to any situation involving unfair advantages or computer-related frustrations.