Studio Mundfish has released two new artworks for the third story expansion of Atomic Heart through its official Telegram channel. The visuals spotlight a submerged landscape and a creature resembling a whale made from synthetic materials, signaling a bold underwater setting for the upcoming chapter. The team has teased that Major Nechaev, known as P-3, will confront intriguing sea life as the narrative dives deeper into this aquatic realm, inviting fans to speculate which marine beings might feature prominently in the expansion.
While there is no official title yet or a precise release window, Mundfish has confirmed ongoing work on the expansion and promised frequent updates as production progresses. The studio and its partners are actively developing the sequel’s story and gameplay elements, with a focus on expanding the Atomic Heart universe while maintaining the distinctive blend of surreal atmosphere and action the series is known for. Stakeholders and players can expect more concrete news when the team feels ready to share detailed information about the project’s scope and milestones.
Atomic Heart first arrived in February 2023, and since then it has seen two narrative additions. The initial expansion, Destruction Instinct, unlocked access to the Mendeleev complex and broadened the game’s lore and puzzle-solving avenues. The second expansion, Prisoner of Limbo, hurled the protagonist into the Limbo dimension, where he encounters Nechaev’s wife, adding emotional texture and new challenges to the campaign. Reviews at launch praised the core game for its ambitious world-building and visual design, though the post-release content drew a mixed reception, with some players praising its creativity and others seeking more in-depth story threads and polish.
For fans tracking developments, the discussion around the third expansion has centered on how Mundfish will balance underwater exploration with combat, puzzle mechanics, and environmental storytelling. Anticipation is high for details on how P-3 will navigate submerged environments, what new enemies or allies might appear, and how the underwater setting will influence level design and progression. The developer team has signaled commitment to delivering a cohesive extension that respects the game’s original tone while offering fresh, immersive challenges that can appeal to both existing fans and newcomers in North America and beyond.
The industry has observed that the Atomic Heart expansions, though not always delivering uniform responses, contribute to a longer lifespan for the franchise by providing narrative expansions and gameplay experiments that keep players engaged. Mundfish appears to be leveraging this opportunity to broaden the mythology around Major Nechaev and the broader world, continuing to push the series into new thematic waters while maintaining the suspenseful, alternative history aesthetic that drew attention from critics and players alike.
While more concrete information remains forthcoming, the underwater concept for the third expansion aligns with a growing trend in action-adventure titles to explore submerged environments as a narrative and gameplay canvas. The studio’s updates through official channels are expected to offer deeper insight into the expansion’s mechanics, potential new tools, and how the story threads will weave with existing events from the base game and prior add-ons. Canadian and United States players can watch for timely announcements as Mundfish moves toward finalizing content and preparing a clear release roadmap for the expansion.