The Last Campfire is delightful, and feels like being read a bedtime story. God, it's good. I could listen to the narrator read the back of a shampoo bottle.

Planet of Lana is a drop dead gorgeous side scrolling puzzle platformer with a beautiful soundtrack and world building.

Beacon Pines isn't technically linear, in that you can complete some stuff in an order of your choosing. But the overall experience is quite linear. Its an exquisite experience, I can't recommend it enough.

If you enjoyed Undertale, play OneShot. No question. Its splendid.

Night in the Woods is a joy as well, it makes me nostalgic for a childhood I never had. Must-play.

Stray - you are a cat doing cat things in a broken future. Splendid experience.

Mirror's Edge is a game I think everyone should experience at least once. It's beautiful.

Celeste - it has the best tuned difficulty curve I've seen in any game, and it wants you to succeed. It also tells a really beautiful story. God the platforming is good. Its so good. By the end of it, you are doing things you never thought you'd dream of doing. You'll feel like a speedrunner with all the little movement tricks you're able to do.

Hellblade: Senua's Sacrifice is a thought provoking masterpiece and a little spooky.