Such a unique and wonderful adventure game. It takes a bit to get used to the controls but it is absolutely worth getting through the process of getting used to it. 4h till completion but the game has a lot of missable achievements.
Approximate amount of time to 100%: 4 hours
Estimated achievement difficulty: 4/10
Minimum number of playthroughs needed: 1, but lots of missable achievements
Is there a good guide available: Yes here
Multiplayer achievements: No
Missable achievements: Yes, almost all of the achievements. I recommend using a guide if you only want to play it once.
Grinding Achievements: No
DLC-Only achievements: No
Time-gated achievements: No
RNG-achievements: No
Does difficulty affect achievements: No
Unobtainable/glitched achievements: No
This is a game with a beautiful portrait story. The controls are weird at the beginning but you’ll get used to them very quickly, a controller is recommended for this game.
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Developer: 
This review is written on 6 Novmber 2017 based on the Steam version which has 12 achievement when I write this review. The information can be outdated when developers add or remove achievements.