At the opening ceremony of Summer Game Fest 2025, developers Mundfish announced not only Atomic Heart 2, but also a completely new project in the same universe — The Cube. This is the name of a multiplayer role-playing shooter, the action of which takes place on a giant floating cube with rotating edges.
Image source: mundfish
The Cube’s Steam page describes it as a living world full of unique characters, diverse biomes, and enemies, combining “unique world-building, intriguing narrative, and exciting quests.”
The Cube will offer to become members of expedition groups that will be sent to that very cube hanging over the planet, hiding “an equation capable of changing the laws of reality.”
While traveling through different objects and biomes (forests, underground laboratories, urban areas, industrial facilities), researchers will be able to collect special items (the description so far only mentioned punch cards) to create improved equipment and more.
The Cube doesn’t have a release date yet, but the Steam page is available for residents of the Russian Federation and the Republic of Belarus. A full translation into Russian (text and voiceover) has been announced.