I.e., games that hooked you in and you couldn’t stop playing until it was finished. Not games that just happened to be unexpectedly short. And by “completed” I guess I mean the main story etc, not 100%ing the game :).
For me, it would be Catherine, Bioshock Infinite and Black Mesa (although I think I got to the final area then had to go to sleep and complete it the next day). I also played an ungodly amount of Hades in one sitting, but didn’t get the “full” ending in one day.
Inside!
Inmost - short platformer/metroidvania game with a brutally emotional storyline.
Far: Lone Sail - short puzzle/platformer game. Chill as fuck, great atmosphere and music. Story is only really gleamed from the environment that you traverse.
Carrion. I was surprised how much fun it was. There’s some nice but not overly difficult puzzles and some frantic bursts of combat
super metroid and metroid zero mission. Man I love those games.
Cataclysm Dark Days Ahead. Because I usually die in like the first week in game lol