We believe that one of the strongest forces in the universe is the “need to create”: every time you build something out of nothing, every time you give shape and organization to something that has no structure – you are creating a miracle.

At Keen Software House we have two areas of interest:

– independent game development: Space Engineers, Medieval Engineers, VRAGE engine
– research and development in artificial intelligence

Keen Software House was founded in 2010 by Marek Rosa.


Motto No. 1: We’re getting it done.

Motto No. 2: Work hard, play hard.

Motto No. 3: Reality is the best game-designer.



We want to create games that are based on real science, real facts, real physics and real emotions. No magic & fantasy allowed.

If we step into the sci-fi area – as we did with Space Engineers and Miner Wars 2081 – we approach it from the hard-sci-fi angle. Every technology and every idea must be explainable using modern-era knowledge with very little extrapolation required.

In Medieval Engineers we hold on to historical accuracy as much as possible while not sacrificing fun, accessibility and intuitiveness.

We want to use our games to promote science and to encourage creativity. We want to revive the interest in space exploration, physics, history and all STEM fields. We want players to learn new stuff while playing our games.

We want to make our fans happy.


Our Products:


Space Engineers


Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses (civil and military), pilot ships and travel through space to explore planets and gather resources to survive. Featuring both creative and survival modes, there is no limit to what can be built, utilized and explored.

Space Engineers features a realistic, volumetric-based physics engine: everything in the game can be assembled, disassembled, damaged and destroyed. The game can be played either in single or multiplayer modes.

The game is currently available on Steam Early Access for Windows/PC.

Space Engineers has sold over 2 million copies since launch.



Medieval Engineers


Medieval Engineers is a sandbox game about engineering, construction and the maintenance of architectural works and mechanical equipment using medieval technology. Players build cities, castles and fortifications; construct mechanical devices and engines; perform landscaping and underground mining.

​Medieval Engineers has sold over 300,000 copies since launch.

The game is available on Steam Early Access for Windows/PC.






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