Rebellion Developments has announced Wicked Isle, the first story expansion for Atomfall, launching June 3 for $19.99/€19.99. Included with the Deluxe Edition and Deluxe Upgrade Pack — and available separately — the DLC introduces a new island region filled with danger, secrets, and potential endings that reshape the main game’s conclusion.

Drawing inspiration from the game’s folk horror themes, Wicked Isle is set on Midsummer Island, a remote and irradiated outpost near the Windscale Atom Plant. To reach it, players must speak to the boat-keeper in Wyndham Village, who offers the first Lead and hints of what lies ahead. The story unfolds through fresh Leads that not only deepen the expansion, but can also trigger entirely new endings for Atomfall itself.
Midsummer’s contamination levels are significantly higher than on the mainland, bringing new enemy factions like pirate raiders and infected druids. Players will unlock new weapons — including a brutal Blunderbuss shotgun, daggers, a cutlass, a new bow, and the eerie Beekeeper’s Staff — along with new skills and an upgraded metal detector to uncover hidden caches.
Wicked Isle will be available across all platforms: PS5, PS4, Xbox Series X|S, Xbox One, and PC via Steam, Epic Games Store, and Microsoft Store, with Game Pass subscribers receiving a 10% discount.