Sony Interactive Entertainment and Giant Squid trademark Sword of the Sea in Europe [Update]

Both Sony Interactive Entertainment and Giant Squid filed a trademark for “Sword of the Sea” in Europe on October 7. The two companies are each listed as an owner of the trademark.

Sword of the Sea is an atmospheric adventure game released for PlayStation 5 and PC via Steam and Epic Games Store on August 19. It was available via the PlayStation Plus Game Catalog at launch, but it was not published or developed by Sony Interactive Entertainment.

Giant Squid, the game’s developer, is an independent studio based in California, which raises questions about the co-ownership of the trademark.

One possible scenario is that Sony Interactive Entertainment acquired the Sword of the Sea intellectual property from Giant Squid. Another is that Sony Interactive Entertainment acquired the studio itself.

Gematsu has reached out to both Sony Interactive Entertainment and Giant Squid for comment, and will update this story with any response.

Update 10/10/25: In response to a user on Twitter asking why Sony Interactive Entertainment co-owns the Sword of the Sea trademark, the official Giant Squid account said, “Sony had a big role in supporting us for the development of Sword of the Sea.” It did not share further detail.