NieR: Automata's 3C3C1D119440927 DLC unlocks three challenging Colosseums. After receiving the Mysterious Letter, you'll need to locate these arenas to access unique rewards.
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The DLC introduces optional content and cosmetic rewards. Each Colosseum features six ranks, with progressively difficult enemies.
Trial of the Sand Colosseum Location
Located in the desert, access this Colosseum from the Desert: Center access point. Zoom out and look to the right (facing the desert entrance) for an orange diamond marking its location. A machine guards the entrance, but it poses no significant threat. Completing Rank S rewards the Destroyer Outfit (A2).
Gambler's Colosseum Location
Starting at the Flooded City: Coast access point, follow the path towards the coast (the same route used to guard the resource ship). At the end, locate a waterfall to the right. Circle around the building to the left, finding a Resistance member guarding the entrance. Bribe the guard with 1,000 G to enter and begin the Gambler's Colosseum quest. A Rank S completion grants the Revealing Outfit (2B).
Underground Colosseum Location
9S ONLY: Access this Colosseum as 9S from the Forest Zone: Center access point. Follow the forest's left edge until you find machines training near a large waterfall. Pass through the waterfall to enter. Completing Rank S unlocks the Young Man's Outfit (9S).
