Octopath Traveler 2: How To Unlock The Infernal Castle Secret Dungeon | Lvl. 55 Location Guide

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Want to fight tougher monsters and level up even more in Octopath Traveler 2? The Infernal Dungeon is a secret dungeon with Level 55 monsters. When everything else in the late-game is only Level 45 maximum, this might be your best bet for grinding your party in preparation for the big post-game story. The Infernal Dungeon also has great monsters to capture for Ochette and unique pieces of gear you won’t find anywhere else. Learn how to enter this tricky dungeon and what you’ll get for overcoming the Dreadwolf with our full guide below.

More Octopath Traveler 2 guides:

All 8 Standard Job Altars | Inventor Advanced Job Guide | Armsmaster Advanced Job Guide | Arcanist Advanced Job Guide | Conjurer Advanced Job Guide | Secondary Job Guild Locations | Best Weapons You Can Find Early | How To Unlock The Ship & Sea Region | Best Weapons To Get Early | Scent of Commerce Quests Guide | Bottled Nightmare Trick | Secret Sunshadow Staff | Ultimate End-Game Weapon Locations

The Infernal Castle is a secret bonus dungeon located in Stormhail — a Tier 3 town in the far northeast of the map. The Infernal Castle can be unlocked at any time in the story as long as you have three party members unlocked.

All four of these characters can recruit a summonable NPC. You need x3 NPCs in your group.

With x7 characters in your party, the rope bridge will snap and drop you into the Infernal Castle. This optional dungeon is Level 55 and features a returning powerful boss from Octopath Traveler 1. To exit, turn around and climb the broken rope bridge back up. There’s a Save Point at the top.

Due to the high level of this dungeon, it is one of the best places to grind for the true final boss story. This area is packed with powerful Strength 9/10.