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 perform landscaping and underground mining.

Medieval Engineers utilizes a realistic volumetric-based physics engine with a focus on structural integrity: all game objects can be assembled, disassembled, damaged or destroyed, and the object’s mass and structure influences its integrity. The game comes with creative mode, survival mode and an entire planet to play on.

Medieval Engineers is the second “engineering” game developed by Keen Software House. The first is Space Engineers, which sold over 2 million copies in its first year.



In 2002, Marek Rosa got the idea of making a physics-based sandbox game where players construct static and dynamic structures in a grid-like environment, with realistic physics and realistic volumetricity.

The inspiration for this idea came from his childhood, where he regularly played with the popular construction toys LEGO and LEGO TECHNIC.

Back then technology wasn’t ready for a full-scale approach, so the first phase of his “master plan” focused only on dynamic voxel terrain. This resulted in our first title, “Miner Wars 2081”.

The second phase started a year and a half before Medieval Engineers and materialized as our second title “Space Engineers” (Space Engineers is inspired by reality and by how things work. Think about modern-day NASA technology extrapolated 60 years into the future).

It is now time for the third phase, and we are proud to present Medieval Engineers.

Medieval Engineers is inspired by real medieval technology and the way people built architectural works and mechanical equipment using medieval technology. Medieval Engineers strives to follow the laws of physics and history and doesn’t use any technologies that were not available in the 5th to 15th centuries.

Medieval Engineers concentrates on construction aspects, but can be played as an action game too. We expect players to avoid engaging in direct man-to-man combat and instead use their creativity and engineering skills to build war machines and fortifications. Medieval Engineers shouldn’t be about troops; it should be about the machinery you build.



Medieval Engineers is in its alpha stage of development and is available on Steam Early Access.

This means that the game is under development and is improved on a regular basis – through updates that add features and content, optimizations and bug fixes. Like us on Facebook, follow us on Twitter and you will be notified of all updates.

Medieval Engineers will remain in development until we gather enough feedback from the community. We need to see how people play our game and what they want us to focus on. Community feedback is expected and will direct our future decisions.

More details about the decisions that led to this project and its development can be found on Marek’s blog.

Everything in the game is subject to change.



Medieval Engineers is the second title fully utilizing VRAGE 2.0, an in-house game engine developed by Keen Software House. VRAGE stands for “volumetric rage” and/or “voxel rage”.

“Medieval Engineers” uses Havok®. ©Copyright 1999-2008, Inc (and its Licensors).  All Rights Reserved.

See for details.

Game Credits



Czech Game of the Year 2014
Technical Contribution Award

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