When I play a game from a genre I usually don't enjoy, thats high praise. With Hollow Knight I'm not just playing it, but really enjoying it on the Steam Deck. The sounds and visuals alone are so enjoyable. The gameplay, progression, level design is top notch, too. Only thing I'm afraid of is it might become too hard for me later.
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I kinda lost interest at some point. Progress was getting slower, I couldn't remember the spots to revisit. Metroidvanias might not be for me, after all.