Emrich in a 1993 Computer Gaming World preview described Master of Orion as "the best that galactic conquest can offer", and summarized its type of gameplay as "4X", meaning "eXplore, eXpand, eXploit, eXterminate" [REF].
In retrospective reviews, Allgame, GameSpot and IGN regarded MoO as the standard by which turn based strategy games set in space are judged, although Allgame regretted the lack of a multiplayer option [REF].