Baldur's Gate 3 Acts: The Three-Part Structure

Baldurs Gate 3 acts number three in total, and each one is anchored to a single large, explorable location rather than a chain of separate levels.

Act One

Centres on the region around the crashed nautiloid: the Druid Grove, the Goblin Camp, the Underdark entrances and Grymforge. This is where most companions are recruited and where the game teaches its systems.

Act Two

Moves into the Shadow-Cursed Lands, dominated by the Shadow Curse and the Last Light Inn as a rare safe point inside it. It is the most atmospherically distinct act, and the one built around Isobel and the Nightsong thread.

Act Three

Opens up Baldur's Gate itself — the largest and busiest single region in the game, where most companion questlines and the main plot converge before the finale.

Why the structure matters

Because each act is one connected region rather than separate missions, choices made early in an act tend to still be reachable — and consequential — by its end. Larian built the game around letting you wander back rather than sealing areas off once you move the plot forward, which is part of why side content in each act runs so deep.