Also something that's arguably absent for over a decade. The last Obsidian game that most people can agree on for having good writing is F:NV.
Otherwise it's a toss up. Unlike most of Codex, I didn't hate Tyranny. I actually think the writing is relatively solid for the main plot and a few of the characters.
My issue with Tyranny was the size of the content and the proposal not delivering what in theory meant. Be a villain a tyrant. Otherwise the game is all right.
Tyranny lures you in with the premise of being a bureaucratic cog for an invading empire who is now tasked with establishing some kind of order in a territory freshly fucked by two rurly warbands only for it to immediately deteriorate into dungeon crawling antics and a insipid plot about obtaining godlike powers and defeating the dark evil.
Within mere hours all it's novelties are reduced to aesthetics and your left with a lame and brazenly unfinished BG imitation, I'll never understand the apologists.
I'm not sure if the claims that Tyranny ran out of money/time are true, but the game is very indicative of modern committee-written games. That is to say, the quality of the writing varied wildly.
What Tyranny does right are elements of its worldbuilding and setting it in the bronze age, with strong Greek (?) city-state influence. But even from the start, the dialogue and character writing (especially the companions) suffered what I'll call fish-out-of-water syndrome.
They clearly did not belong in the harsh world they supposedly are a part of. They are instead character tropes that modern audiences can understand and sympathize with.
More grimdark needed.