UnderwaterFunktown overtook S.Peelman with now 4 guesses. Darashiva and Machina are still in the lead. See here.
Let's add some hints for the unguessed games:
#20: Baldur's Gate as guessed by Darashiva.
#19:
The game has some innovative ideas, mainly it tries it's hand at procedural story generation and character growth, meaning each playthrough is different.
First the Age of Ulstryx.
#18: Breath of the Wild as guessed by Darashiva.
Our boy needs a 100-year nap after losing a fight and the girl has to hold the fort for the time.
#17: (not Outer Wilds)
20 minute survivors.
#16:
"Sorry to keep you waiting!" ... does a simple sorry cut it, if the wait was 26 or 21 years (depending on the region)?