Probably incomplete list that I may update after a nap.
Outer Wilds
The most sublime game I've ever played. I can't begin to describe how this game made me feel. It's also an excellently designed game. If you've never played it before, go in blind, because even the smallest spoilers risk diminishing your experience. It's an open world, exploration adventure game, which involves space travel, a quaint setting and fun physics
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Disco Elysium
Another game that made me feel things. One of my favourites
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Tetris
Played it on a Gameboy back in' day. It's a great game
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Rollercoaster Tycoon 2
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Halo Reach
I don't even know if I believe this was the best Halo game, I was just indecisive and I'm biased because I like the DMR and the SWAT multiplayer game mode (no shields, so a headshot kills in 1)
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Deep Rock Galactic
Feel like it's the peak of the four person squad based kind of game. I've literally got hundreds of hours in this game.
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Stardew Valley
I didn't actually vibe with this too much personally, but I've got to respect it for how accessible it is to many different kinds of gamer. It executes what it set out to do perfectly.
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Faster than Light
I don't even like rogue likes generally. The soundtrack is great.
I've already played it but yes, that's a great recommendation for anyone who has enjoyed the games I mentioned. I especially enjoyed it because I'm also a fan of Dark Souls (& other FromSoft games), and it was neat to have souls-like combat in such a cute packaging.