In Baldur's Gate 3, there has been some debate among players regarding the exact ending point of Act One. Some believe that Act One concludes upon entering the Moonrise Tower. However, this doesn't align with the game's structure, as there isn't any significant traversal or event associated with entering the tower.

What Is The End of Act 1?

The end of Act One is when you leave to either the Underdark or the Mountain Pass. At this point, the game will ask "Are you sure you're ready to continue?" This prompt serves as a clear indication that players are transitioning from Act One to Act Two. Entering the shadow-cursed lands counts as the start of Act 2.

Regardless of the chosen path, whether it's the Mountain Pass or the Underdark, players will encounter the Weary Traveler as they approach the Shadow-Cursed Lands. A popup warning will then appear, asking players to confirm their readiness to progress the game. By selecting "yes," players officially conclude Act One and embark on Act Two.

How To Leave Underdark To Finish Act 1

To leave the Underdark, head to the Underdark – Beach region, and use the Underdark Duegar Boat to access the Grymdark. Find Nere and get the Moonlantern from him. Proceed to the elevator, which is the gateway out of the Underdark. Upon using the elevator, players will mark the end of Act 1.

1. Start by making your way to the Underdark – Beach region, located in the western part of the Underdark.
2. Navigate through the Myconid Colony, head west toward the Sussur Tree, and then move south to reach the Beach.
3. At the Beach, you'll find Duegar Dwarves. You can choose to ambush them or side with them.
4. After dealing with the Dwarves, use the Underdark Duegar Boat to travel to the Grymdark.
5. In the Grymdark, locate Nere. Your main objective is to obtain the Moonlantern from him.
6. If you can't find Nere immediately, continue south to the Underdark – Ancient Forge where you can craft weapons and armor. You might need to defeat the boss, Grym, at the Adamantine Forge.
7. Return to the Grymdark and search for Nere's body if you haven't found him alive. Loot the Moonlantern and the rare boots called Disintegrating Night Walkers from him.
8. To exit the Underdark and conclude Act 1, locate the elevator near the Underdark – Grymdark fast travel point.
9. Approach the elevator, and an NPC might advise you to have a Moonlantern. While it's beneficial, it's not immediately necessary.
10. Use the elevator to ascend, marking the end of the Underdark section and the completion of Act 1.