NieR: Automata's 3C3C1D119440927 DLC unlocks three challenging Colosseums. After receiving the Mysterious Letter, you'll need to locate these arenas to earn unique rewards. Here's a guide to finding each:
Quick Links
Trial of the Sand Colosseum Location
This Colosseum is situated in the desert. From the "Desert: Center" access point, zoom your camera out. Look to the right (facing the direction you entered from) for an orange diamond-shaped structure. A machine guards the entrance, but it poses no threat. Inside awaits the Trial of the Sand Colosseum quest.
- Rank S Reward: Destroyer Outfit (A2)
Gambler's Colosseum Location
Begin at the "Flooded City: Coast" access point. Follow the path to the coast, the same route used to protect the resource ship. At the end, look right for a waterfall. Circle around the building to the left, finding a Resistance member guarding the entrance. Bribe them with 1,000 G to enter and start the Gambler's Colosseum quest.
- Rank S Reward: Revealing Outfit (2B)
Underground Colosseum Location
9S ONLY: This Colosseum is accessible only when playing as 9S.
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 Underground Colosseum.
- Rank S Reward: Young Man's Outfit (9S)