Not a game Minimus just a perfectly reasonable question.
Many people who claim to believe in god actually have in mind a vague, nebulous notion of some - hopefully benevolent - supernatural being. Others are thinking about an imminent god who answers prayers, observes everything that happens, cares about who we sleep with and how we do it and who is going to punish those who don't return his 'love'.
The difference is so profound that asking people if they 'believe in god' is a meaningless question that nobody should indulge without further explanation.