Metascore
68

Mixed or average reviews - based on 8 Critic Reviews

Critic score distribution:
  1. Positive: 5 out of 8
  2. Negative: 1 out of 8
  1. Feb 14, 2017
    60
    iO proves that you don’t need a great story, you don’t need stunning visuals, you don’t need complex controls and you don’t need a banging soundtrack. You will however need to be a certain type of gamer to enjoy all the stages that iO delivers, but should you be a puzzle fiend and in the market for a clever, albeit slightly frustrating, abstract brain taxer, then you could do worse than check it out.
  2. Feb 21, 2017
    50
    What's there in the game is quite good, the issue is that there isn't very much of it. Once you've had your fill of the challenges in the main game, there's nothing else to do except speed run those same levels again. That on top of a complete and utter lack of production value of any kind leaves the game feeling more like a prototype of a cool idea than a full game.