Gruta (EP)

Most players can't miss this achievement, in my case the achievement refused to unlock. I started a new game and for some unknow reason all chest cutscenes at the end of each level were the same and after opening the chest at level 10 the achievement still refused to unlock. I had to delete all my data to start a really fresh game. Cutscenes start to work again and the chest at level 10 finally gave me the achievement. So if you are in the same situation like me, you now know what to do.