During Summer Game Fest 2025, Atomic Heart developer Mundfish also unveiled a new project called The CUBE. It still takes place in the same setting as the original game and the freshly announced sequel, but it will be a much different game: an MMORPG shooter.
The developers are trying to mix unique worldbuilding, an intriguing narrative, and exciting quests into one game. The goal is to create a living world full of memorable characters, diverse biomes, and tons of enemies, including powerful bosses. The backstory is that a giant cube appeared in the sky and players will have to scour its ever-shifting environments and mysteries.
Robert Bagratuni, Founder and CEO of Mundfish, said in a statement:
At Mundfish, we were the first in the industry to implement a technology that allows thousands of objects to move and rotate simultaneously across massive stretches of terrain — online and in real time. No other game has ever done this before. This became possible thanks to our innovative proprietary split-rendering system, which redefines how motion is handled in interactive environments. The technology delivers maximum performance even under extreme load. In The CUBE, physics, ballistics, and gravity feel completely natural — but under the hood, it’s powered by rocket science. The system enables seamless transitions, precise object tracking, and synchronized multiplayer in a living, ever-evolving world. It’s a true technological breakthrough.
The CUBE has no release date yet, but given the genre, it might take a while. Meanwhile, you can already add it to your Steam wishlist. The game is also being developed for consoles, by the way.
About the author: With over two decades of experience in gaming journalism, Alessio Palumbo has led the gaming vertical at Wccftech since August 2015. He started working at a young age for Italian websites like Everyeye.it, Gamestar.it, Nextgame.it, and Multiplayer.it before kickstarting the indie English-language publication Worlds Factory as its founder and Editor in Chief. In the last decade, he has coordinated the overall output of Wccftech's gaming section, managed PR relations, assigned reviews, produced daily news coverage, edited gaming content as needed, and delivered game reviews. Arguably, his trademark content is the long series of exclusive developer interviews that have been cited by Wikipedia and by the biggest news media and gaming publications. His passion for technology also makes him knowledgeable when it comes to gaming hardware and tech. His favorite genres include RPGs, MMORPGs, and action/adventure games.
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