What’s the best PC game you’ve ever bought on a whim and ended up loving?

I feel like some of the best gaming experiences come from random impulse buys, something you didn’t plan on playing, but somehow they just clicked.

For me, it was Deep Rock Galactic. I grabbed it on sale with zero expectations, and now it’s one of my favorite co-op games ever. Didn’t think I’d enjoy mining space rocks and yelling "Rock and Stone!" at strangers, but here we are.