There's also Pillars of Eternity. The thing is that Planescape Torment and KOTOR 2 are basically the same game. So is Lonesome Road.
One long, "You suck, the world sucks, and you're better off dying."
I feel like that's an unfair comparison. Sure you could make the comparison about the cynical undertones, but there's more to it than that:
Pillars of Eternity is about the idea of the sacred, and whether it's necessary. Thaos sees the world as an inherently hobbesian place, and sees the role of the Leaden Key and thus the creation of the Gods as a necessary part of keeping human society in line by forcing people to dedicate themselves to abstract ideals coded as absolute authorities, believing in this so much that he dedicates himself to Woedica and the order she represents even knowing full well that she's a false god created by humanity. The ultimate culmination is whether Thaos is right and the world needs that, or whether humanity can deal with the non-existence of God and create a more fleshed out morality based on rejecting the flase religious narratives of the past.
Planescape Torment is about making a faustian deal in rejecting damnation and whether it's worth it, and the consequences of living a life whereby you technically both live forever and avoid the consequences of your actions, but in a way that has you cycle through life after life of demi-god like power, in which you can't control the actions of previous and future lives no matter the harm they cause, and whereby your identity is effectively erased each time you start a new one.
KOTOR 2 is a take on the classic Star Wars idea of the Force and asking whether it's moral to allow religious devotion an abstract force of nature to determine people's lives
There are similarities, but they are ultimately different narratives with different culminating questions.
