I was surprised to see we never reviewed this. That was probably because I was still sorting through my feelings on it back when it first came out and then forgot about it, but it attracted my attention again after I started reading The Fury of a Shattered Mirror and I watched the new content added in The Pristine Cut.
If you’re not familiar, Slay the Princess is a visual novel where you interact with various iterations of a trapped princess. The narrator is a distinct character with an agenda: He insists that the Princess will end the world if she is freed, so to save the world you must slay her. No matter what you do in your first meeting, you end up dying horribly, wherupon the scenario resets, but with the Princess altered to reflect your actions and opinions towards her in your first meeting. The narration also uses a similar schtick to Disco Elysium, with each scenario granting you additional voices alongside the Narrator with their own personalities and suggestions.
My overall opinion is that this game isn’t nearly as clever as it thinks it is.