Fulton, Jeff; Fulton, Steve (2010). "A short history of Missile Command". The essential guide to Flash games: building interactive entertainment with ActionScript 3.0 (Newed.). Berkeley, California: Friends of ED. p.138. ISBN978-1-4302-2614-7. Retrieved February 7, 2012. While certainly not the size of Asteroids, the game was still a huge hit with almost 20,000 units sold.