Thought about making this topic because I'm a repeat offender in this category. Off the top of my head:
The Talos Principle, which I stopped playing after having reached the final set of puzzles and with 13h of play.
Divinity: Original Sin, where I have more than 60h between both version but have never progressed beyond the first half of the second area/town you visit (also, is it just me or does Cyseal offer waaaay too many quests right off the bat?).
Lords of Xulima, where I've clocked a whopping 60h but stopped flat, with no immediate reason I can think of.
And really, many others. What about you?
The Talos Principle, which I stopped playing after having reached the final set of puzzles and with 13h of play.
Divinity: Original Sin, where I have more than 60h between both version but have never progressed beyond the first half of the second area/town you visit (also, is it just me or does Cyseal offer waaaay too many quests right off the bat?).
Lords of Xulima, where I've clocked a whopping 60h but stopped flat, with no immediate reason I can think of.
And really, many others. What about you?