In Act 3 of Expedition 33 in Clair Obscur, here is what you should do:
- At the start, you will be at camp watching story events. After that, talk to every party member and watch their bond scenes to unlock their powerful Gradiant attacks and exclusive dungeons and bosses. Maxing bonds with Maelle unlocks "The Reacher" dungeon, and maxing Esquie unlocks the dive point "Renior’s Drafts"
- You can explore many new areas unlocked by Esquie's flying ability, such as The Fountain, Flying Casino, Siréne's Dress, Sacred River, and The Reacher. These areas contain new challenges, bosses, and collectibles
- Before heading to the final dungeon Lumiere, complete side activities like Gestral Beaches (platforming/minigame challenges) and defeating 12 Mimes in dungeons to earn costumes and hairstyles
- In the Spring Meadows area, explore thoroughly, including the waterfall base for Chroma, use the grappling hook to cross cliffs, and fight enemies like the Lancelier and Portier to learn combat and gain items like Dodger Pictos
- At Lumiere, find all weapons, Pictos, and collectibles. You will duel Maelle for a Festival Token and can rematch her if you lose. After the duel, a cutscene leads to the start of Chapter 1
- For the final boss fight in Act 3, prepare by leveling up and using the best loot and strategies to defeat Renoir
- If you want to progress the story quickly, fly to Lumiere and enter the final dungeon. You can leave Lumiere after entering if you want to explore more before finishing
In summary, Act 3 opens up a large world with flying, new dungeons, side quests, collectibles, and challenging bosses. Focus on bonding with characters, exploring new areas, completing side content, and preparing well before entering the final dungeon Lumiere
