Here on VdZe media we have a 0-5 star system that also includes half stars. Below is a rough breakdown on what the translates to.
Half points fall into the rounded down category but would have something dragging them a little above and beyond. For example a game ranked two stars and a game ranked two and a half stars would both be considered passable, but the two and a half star game would have something a little extra. A gameplay mechanic, a plot point etc. The half star would let you know it’s on the high end of passable games.
Review scores are not an exact science, it’s a number given by an individual and is highly subjective. Many of us may vary drastically on review scores, but that should spark healthy debate and a good conversation.