 These games were notable for not only being one of the first science fiction RPGs to appear on personal computers, but also for providing a level of realism not found in other games of the time.The game system was based upon the "Traveller" role-playing-game, created by Game Designers Workshop, which sued Edu-Ware for copyright infringement in 1982.In an out-of-court settlement, both "Space" and "Space II" were removed from the market.