I'm playing Hyper Light Drifter, probably past half of the game at this point with 2 bosses dead and I still have no idea of the game plot.

If someone asked me, I'd say the rejects from the anime Evangelion tried to destroy the world and gave you tuberculosis when you defeated them. You go around the world reactiving purple crystals to perhaps turn on the last drugstore with some antibiotics.

While I won't say a solid narrative is mandatory to make a good game, stuff like Darkest Dungeon spoiled me.