Cars frontman Ric Ocasek samples audio from Missile Command in his solo track Keep on Laughin'. Earthbound composer Hirokazu Tanaka then samples a slowed down snippet of the intro to Keep on Laughin' throughout Moonside's theme, Missile Command sounds intact.
The six degrees of separation between Atari, Undertale, The Cars and Cold War fears of nuclear annihilation are reduced by at least half.
(Sources: WhoSampled, iwanttobelieve)