I’ve played or own about half of these, and those I’ve played have been great. To me that means this person is a good curator. Here are a few I’ve especially enjoyed:
Black Mesa - never played HL before it, and I found it fantastic; in fact, HL2 felt like a downgrade to me in gameplay, that’s how good BM was
Baba is You - I’m a software engineer, and this totally nerd sniped me
Manifold Garden - not too difficult, but tons of fun and a very unique puzzling experience
Yooka Laylee and the Impossible Lair - only mentioning because I adored the original; this is fun too, but the OG is fantastic; not sure if this should qualify since it was made by former AAA devs
Slay the Spire - fantastic game, though I found Inscryption to be even better for me since it offers more than just a card battler (StS is rogue like, Inscryption is more complicated)
The Forgotten City - haven’t played it yet, but it looks like a ton of fun
I didn’t like a few of them (e.g. Jet Lancer), but that’s mostly because I don’t like the genres they’re in, not because they’re bad games.