The vast majority of my favourite games have been listed, many multiple times, so I’m gonna go with some I didn’t see, though I didn’t look exhaustively, here we go:

Horace

Quite a hidden gem in my opinion, almost no one I mention it to has heard of it. 2D platformer with an amazing story and some interesting gimmicks. One of the most surprising and unforgettable indie games I’ve played.

The Messenger

Ninja action-platformer that is way more than it first appears if you stick with it. Hilarious writing, great controls, and amazing music. Genuinely one of my favourite games.

Yoku’s Island Express

Almost entirely unique in it’s idea. It’s a pinball-metroidvania where you’re a postman dung beetle, and it really works. Gorgeous world, super chill vibes, clever puzzles… What metroid prime pinball should have been.