Petroff Games, which is one developer in South Africa, announced on October 10, 2026, that a free Steam demo of its turn-based space 4X Imperium is out now. The full game is due in Q4 2026 for Windows, macOS and Linux, including SteamOS, with no price announced. The demo is also part of Steam Next Fest, which runs October 19 to 26.
A 4X is a strategy game where you grow a single colony into an empire across a big map. In Imperium, that map is a galaxy. You start on one homeworld as one of 21 alien species, none of them human. From there you build up colonies tile by tile, pick research from a web of 68 technologies, and design ships from 80 components across five hull sizes. Fleet battles are turn-based too, and a ship’s power decides what it can do in them.
How Imperium’s rival empires are meant to behave
“Most 4X rivals exist to be beaten,” Petroff Games writes in the announcement. In Imperium, it says, the AI empires play the whole game: they sign treaties with each other, spy, hold grudges and go to war over their own aims. Rivals that only react to the player turn a long campaign into a solo puzzle. This is the claim the demo has to back up.
Diplomacy runs on Imperium Points, which you spend on things like a casus belli, a formal reason to go to war. You can also win through politics. Get elected Premier of the Galactic Senate, or declare yourself Emperor and see who objects. The Steam page counts six victory paths in all, including military elimination, conquest of every home star and galaxy-wide peace. Ancient ruins add a slower thread, with scans that take decades of game time and can go wrong.
How Petroff Games got Imperium to a demo in seven months
Daniel Petroff has 20 years in software and a design background. Imperium, started in March 2026, is the studio’s first PC game after two mobile games. The code is written by Claude, an AI model, under Petroff’s design and direction, according to the announcement. The AI disclosure on the Imperium Steam page adds that the art came from Midjourney and ChatGPT. The music came from Suno and the sound effects from ElevenLabs. The studio’s own page says the art, music and sound were “hand-finished” after that. The opponents, the store page notes, run on traditional algorithmic AI, not generative AI.
Seven months from a standing start to a Next Fest demo counts as a sprint for a 4X. This is for players who care more about rivals with their own agenda than about the length of the tech tree. The demo is free on Steam now, in English, Russian, Simplified Chinese and Japanese, and it costs nothing to test that claim before the full release.
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