 Although the gameplay is simple (eight directions and one fire button) a large variety of context sensitive actions can be performed without any predefined keys.The game was ranked best game of all time by "Amiga Power".In 2007 Henry Lowood, Curator for History of Science and Technology Collections in the Stanford University together with game designers Warren Spector and Steve Meretzky, researcher Matteo Bittanti and journalist Christopher Grant compiled a definitive list of "the ten most important video games of all time".