Part of Bandai's Game for Adult 'IF' series.Game for Adult meaning aimed at older players, not anything with objectionable content.'If' just refers to the their gimmick of setting up each game in the series as a 'What if... (insert game scenario)'Complexity 3.5 on Bandai's 1-7 scale (1=easiest)Based off the late 60s science fiction sexy action anime. This is more of a role playing/boardgame mix than anything, but it really is unique and tough to explain. There is a flip-book that has various locations depicted to use as a board, but the game does unfold like a dungeon-crawl RPG despite taking place in the far future. - BoardGameGeek