After completing Act III in Clair Obscur: Expedition 33, players unlock access to a hidden and optional area known as the Flying Casino. This secret location can also be visited once you’ve wrapped up the main storyline, and although it isn’t required for progression, it offers a neat cosmetic for Monoco. It is called the Lumiere Outfit, a unique skin only obtainable at the Flying Casino. This guide will walk you through exactly how to get it.
How To Reach The Flying Casino

To access this area, you must first have unlocked Esquie’s Fly ability. Once you have it, head toward the northeast of Stone Wave Cliffs. Look for a tall cliff with a glowing portal and a neon “Game Club” sign. It’s hard to miss once you know where to look, and the ability to fly makes getting there much easier.

Once you enter the portal, you’ll arrive at the Flying Casino and unlock the Entrance expedition flag. You’ll immediately spot a large glowing Gestral directly ahead. Don’t worry—all the Gestrals here are non-hostile.
How to Get the Lumiere Outfit

Start by following the path beside the glowing Gestral. Continue until you reach the end of a wooden bridge, where you’ll see another cliff with yet another “Game Club” sign. Use your grapple to reach this next ledge.

Beneath the sign, you’ll find a wooden panel that looks empty. Turns out, there is a Gestral hiding behind it. If you approach with a human character, he’ll refuse to interact. Instead, switch to Monoco, then engage with him. Go through all his dialogue (your choices don’t matter), and once the conversation ends, you’ll receive the Lumiere Outfit as a reward.
Additionally, you can also go east of the cliff to find Reveries Dans Paris music record, which counts towards the Connoisseur achievement/trophy.
Check our guides here to get all such collectibles in the Gestral Village, and the Forgotten Battlefield areas.