Finish Act 2 and reach the endgame state
Complete the required main story objectives in the late-game area
Defeat the final Act 2 boss
Watch the ending credits or complete the ending sequence
Reload your save after the ending
Continue from the post-game state to access Act 3 content if unlocked by your progress
If Act 3 is not available, complete any remaining mandatory quests, bosses, or progression requirements tied to the true ending path