Hollow Knight

Bought it not long after it came out because I was so in awe with the visual style. Played it for some hours and thought it was fun, but it was not clicking with me as much as I thought it would. It got even worse when I got stuck in the progression. I put the game down and did not play it for a while. Fast forward 3 months and I decide to pick it up again. For some reason this time I found out where to go next and from that moment I could not stop playing it. I could not believe how vast the exploration felt. To this day it is still my favourite game of all time.