NieR: Automata's 3C3C1D119440927 DLC unlocks three challenging Colosseums. This guide details their locations and Rank S rewards. Remember, you'll need to receive the Mysterious Letter after progressing the game slightly.
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Trial of the Sand Colosseum Location
Located in the desert, access this Colosseum from the Desert: Center access point. Zoom out your view and locate an orange diamond-shaped structure to the right of your entry point. A machine guards the entrance, but it poses no significant threat. Completing this Colosseum offers the Destroyer Outfit (A2) as a Rank S reward.
Gambler's Colosseum Location
Begin at the Flooded City: Coast access point. Follow the coastal path used during the resource ship defense mission. At the path's end, locate a waterfall to the right. Circle around the building to the left of the waterfall; a Resistance member guards the entrance. Bribe them with 1,000 G to enter and start the Gambler's Colosseum quest. The Revealing Outfit (2B) awaits as the Rank S reward.
Underground Colosseum Location
9S only. Start at 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 access the Colosseum (only accessible as 9S). The Young Man's Outfit (9S) is the Rank S reward.
