Grate Hall Trophy / Achievement Guide (How to access the Oubliette) in Enter the Gungeon
This video shows you how to unlock the Grate Hall Achievement / Trophy which requires you to enter the Oubliette in Enter the Gungeon. To enter the Oubliette, you need to access a hidden switch in the fireplace on floor 1. You'll need to extinguish the fire in the fireplace with a water or ice gun or push a barrel of water into it. You will then unlock a hidden room which has a trapdoor to the Oubliette that requires 2 keys to unlock. Once you access the Oubliette, you will unlock the Grate Hall Achievement / Trophy as well as the Trashcannon gun. This video was captured at 1080p and 60 fps on the Playstation 4 (PS4) version of Enter the Gungeon.
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At present, Video Game Sourcing has 4,204 views spread across 1 video for Enter the Gungeon, and less than an hour worth of Enter the Gungeon videos were uploaded to his channel. This makes up less than 0.02% of the total overall content on Video Game Sourcing's YouTube channel.