Looking For The Best Single Player PC Games

Hello friends, I am looking for the best single-player PC games. Could someone please suggest some good names for the best single-player PC games? Any kind of suggestions will be highly appreciated.

Any specific genre? There are a lot and they vary.
 
Witcher series, especially 3  
Undertale  
FNAF  
Divinity series  
Civilization series  
Creeper World series  
Terraria  
Starbound  
Factorio  
Mindustry  
Cult of the Lamb  
Elden Ring  
Shenzhen I/O

SkiFree  
Minesweeper  
Spider Solitaire  
Math Blaster 2: Secret of the Lost City  
Battle Chess