Far Harbor, Fallout 4’s last and most substantial DLC, will be a pretty big expansion. How big? Well, it’s going to be bigger than The Elder Scrolls Oblivion’s Shivering Isles expansion. So pretty darn big.

Bethesda’s VP of marketing and PR Pete Hines has responded to a tweet by a fan regarding the DLC’s size. In his response, Hines has specifically confirmed Far Harbor will be bigger than Shivering Isles.

Bethesda has already mentioned Far Harbor will be its biggest piece of DLC to date, in terms of area at least. The DLC will follow a new case from Valentine’s Detective Agency, where players go searching for a young woman and a secret colony of synths. There will be new settlements to build, quests to complete, gear to collect and foes to kill.

Far Harbor is slated for a May release, and will cost $25 outside of the game’s Season Pass.

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