Guessed by @Mnementh
On a random evening in 2016, I was desperate to play something but had no controller on me, so I asked my friends to recommend a game that's good on keyboard/mouse. One guy recommended this. Looking back, honestly, I'm not sure about his recommendation, the game looks a lot better with a controller, but hey, I did get to play an awesome game! Hyper Light Drifter's got really great gameplay, but what hooked me was the extremely heavy atmosphere, with its cryptic story, dark soundtrack, and terminal disease infected protagonist. Several years on, I still have no idea what was going on with the story here, neither do I remember much (having never gone back to it is the main reason for the steep fall here). But what I do remember, is that it was a really great game.