Work in progress, but off the top of my head:

Shadow of the Colossus\\
Outer Wilds + Echoes of The Eye DLC [NOT The Outer Worlds]\\
Suikoden 1 [NOT 2, but 2 is really good]\\
Return of The Obra Dinn\\
Windjammers\\
Power Stone\\
X-Men vs Street Fighter\\
Final Fantasy VII\\
Maniac Mansion\\
Bioshock\\

I'm almost positive not a single person other than myself will ever see this, but I think it's best to expand lists like this to a top 25 at this point. There are tens of thousands of games spanning a growing list of genres. There are too many great games competing for X slot so I'll be adding to this list soon.