Outer Wilds is one of those games that is better the less you know about it. So I will be a bit vague, bit this would be my pitch:

It's a space archeology game with a very good story, charming characters, and an intriguing mystery. It has fun mechanics, as I enjoy simply flying around in the ship (once I got the hang of it) and some unique puzzle design.

After the tutorial section it is an extremely non-linear experience.

Highly recommend, don't look up any spoilers though!