Brittle Hollow

Outer Wilds guide · Second major planet exploration

Brittle Hollow is a collapsing planet with a miniature black hole at its center, bombarded constantly by volcanic meteors from its moon Hollow's Lantern. You must navigate its treacherous surface and underground ruins to learn about the Nomai, uncover quantum rules, and find a route to the hidden Black Hole Forge. As time passes throughout the loop, surface crust segments break apart and fall into the black hole, making exploration an urgent race against terrain destruction.

Secrets

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Black Hole Forge access | The forge itself clings to the underside of the crust above the Hanging City, but you cannot reach its controls from below; you must raise the forge using the switch in the Hanging City, then travel to the Ash Twin warp tower to teleport safely onto its ceiling walkway.Quantum Knowledge Tower path | The entrance to the Tower of Quantum Knowledge is blocked by gravity crystals on Brittle Hollow; you must wait until the crust chunk holding the tower breaks off and falls through the black hole into zero-g space at the White Hole, where you can simply float inside.

Shops and people

Riebeck: Offers campfire rest, roasted marshmallows, banjo music, and helpful dialogue regarding their fear of space and archaeological findings on Brittle Hollow.

Tips

Falling through the central black hole will not kill you; it teleports you to the White Hole in deep space, where you can use the nearby White Hole Station to warp straight back to Brittle Hollow.
Keep a close eye on the structural integrity of the ground beneath your feet, as whole sections will crumble into the void without warning if struck by meteors.

Not listed for this area: items, enemies.

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Giant’s Deep

Ember Twin

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