Metascore
68

Mixed or average reviews - based on 7 Critic Reviews

Critic score distribution:
  1. Positive: 2 out of 7
  2. Negative: 0 out of 7
  1. Feb 16, 2017
    80
    iO works great in situations where you might only have a few minutes to work through a level or two. It’s fun to jump in, solve a course, and move on to the next. The focus on momentum makes this feel pretty unique and the game’s 225 courses get a good deal of mileage out of the grow/shrink mechanic. Considering this is a game that I only heard about a week ago, this turned out to be a pleasant little surprise.
  2. Feb 16, 2017
    75
    Io‘s camera zooms out as the ball enlarges, and zooms in as it shrinks. Players look at an overview of the level, plan out their move, and start rolling. Then, at a key moment, they shrink the ball down and the camera pulls in tight. Suddenly the whole world is zipping past and all situational awareness disappears, with players forced to hold their breath and hope that they’ve timed their transformation correctly. Io is a faster, more nimble puzzle game than I’m used to, and when it works, there’s nothing else quite like it. Luckily, it works more often than not.