Human Killing Machine (also known as HKM) is a 2D fighting video game. The game was developed by British company Tiertex who hired external team Blue Turtle (Nick Pavis and Leigh Christian) to produce the graphics, and published by U.S. Gold, released in March 1989. It was touted as a sequel to Tiertex's home computer conversion of Street Fighter (as the two companies later did with Strider II). It was released on the 8 and 16-bit home computer formats.