Verified patch notes, affected platforms and developer-listed issues.

Sea of Thieves
Sea of Thieves Release Notes – 3.9.1
Oct 22, 2026 · Steam update tracked by Buffs & Bugs
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What changed for Xbox
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Quick take
Custom SeasThe free customisation toolset introduced in Season 20 expands with new options and additions! The Devil’s Shroud surrounds the island, keeping crews focused on the action. New SwitchesEmergent Sea Forts – Within Emergent World Events, Sea Forts can now be disabled from becoming an emergent encounter during a session. Emergent Ashen Garrisons – Within Emergent World Events, Ashen Garrison encounters can now be disabled during a session. Fog – Within Wea
What officially changed
Custom SeasThe free customisation toolset introduced in Season 20 expands with new options and additions! The Devil’s Shroud surrounds the island, keeping crews focused on the action. New SwitchesEmergent Sea Forts – Within Emergent World Events, Sea Forts can now be disabled from becoming an emergent encounter during a session. Emergent Ashen Garrisons – Within Emergent World Events, Ashen Garrison encounters can now be disabled during a session. Fog – Within Wea
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