The three-act structure to narrative fiction has existed since time immemorial‚ since the days of Aristotle through to modern-day movies and videogames. But there are few game developers that have embraced an Act-style structure so voraciously as Larian. You look at their games from Divinity: Original Sin back in 2014 through Baldur’s Gate 3‚ and you can identify the same fundamental structure in all their games (Divinity: Original Sin 2 actually had four acts‚ though acts 3-4‚ The Nameless Isle and Arx‚ were on the weak side‚ and perhaps their efforts would’ve been better served simply making Arx more fleshed-out).