Medieval Engineers is a sandbox game about engineering, construction and the maintenance of architectural works and mechanical equipment using medieval technology. Players build castles; construct mechanical devices and underground mining. There is an entire planet to explore!
Recent Reviews:
Mixed (23) - 60% of the 23 user reviews in the last 30 days are positive.
All Reviews:
Mixed (3,662) - 69% of the 3,662 user reviews for this game are positive.
Release Date:
Feb 19, 2015

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Medieval Engineers is an Early Access game, which means that it is released while under development but is already in a very playable state and contains a vast amount of features. The game is being improved on a regular basis through updates that add and polish features and content, optimizations and bug fixes.

Getting real feedback from our community is our topmost priority. Working on a game behind the veil isn’t fun and is altogether much less effective. Real people with real needs and real voices you can listen to are the heart of game development. We invite all players to give us their feedback and suggestions and help us create the best game possible!

Buy now, play on Steam and receive future updates.

Everything in the game is subject to change.”

Approximately how long will this game be in Early Access?

“Medieval Engineers will remain in Early Access development until we gather enough feedback from the Community. We need to see how people play our game and what do they want us to focus on. Community feedback is expected and will direct our future decisions. We want to ensure that our players have the best experience possible and we will continue to develop the game in Early Access for as long as it is required in order to achieve it.”

How is the full version planned to differ from the Early Access version?

“We are planning to release new updates on a regular basis. These updates will contain new features, optimizations and bug fixes. The same model has been used for our first Early Access title, Space Engineers (, with great success. New additions to the game will be also depended on player feedback.”

What is the current state of the Early Access version?

“The first release of Medieval Engineers will feature: Creative mode (unlimited resources, instant building, invulnerability, levitation), Steam Workshop (SDK + API), damage, and structural integrity. Multi-player and survival modes will come later. A full list of all the features can be found on our website:

Will the game be priced differently during and after Early Access?

“All players who decide to purchase the game in Early Access will receive future updates. The price of Medieval Engineers is going increase gradually for as long as it is under development and more features are being added.”

How are you planning on involving the Community in your development process?

“Our studio has a very good reputation for developing Early Access titles and the way we involve our players in this process. Our first Early Access game, Space Engineers, is considered to be among the most successful Early Access projects on Steam. Getting real feedback from the Community is our topmost priority. Real people with real needs and real voices you can listen to are the heart of game development. There is a dedicated sub-forum where players can report bugs that they find in the game ( Players can also interact with the community and developers on our discord server
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Packages that include this game

Buy Medieval Engineers and Space Engineers

Includes 2 items: Medieval Engineers, Space Engineers

Buy Engineering Deluxe

Includes 3 items: Space Engineers, Medieval Engineers Deluxe Edition, Space Engineers Deluxe


Recent updates View all (188)

May 21

An Update on the Development of Medieval Engineers and a Special Message

We’d like to share an update with you all on the development of Medieval Engineers as well as a message from Tim ‘Deepflame’ Toxopeus Project Lead Medieval Engineers:

18 comments Read more

February 14

Update 0.7.1 - Major Overhaul of Audio, Visuals, & Blocks

Hello, Engineers!
We’re thrilled to announce that the 0.7 update has arrived and it’s filled to the brim with tons of exciting new features and enhancements! Whether you’re looking for updated block visuals, new blueprint building in survival, improvements to multiplayer or modding tools, there are plenty of fantastic new additions to experience in Medieval Engineers!

We are extremely proud of the work that has gone into the design of 0.7. The models -- and many aspects of building in the game -- have been redesigned from the ground up. Today we unveil this, and leave 0.6 behind. We recognize that with such a huge change, there will still be bugs, errors, imbalances. But given that Medieval Engineers is still in Early Access, we wanted you to jump in, see how it works, and help find the things that don't work right. If it ever becomes too much, you can switch back to the stable 0.6 branch as always!

Block Visuals:
We have remodeled and retextured almost everything when it comes to blocks. You’ll notice that there are no longer any hard edges. We have introduced parallax shading to bring more depth to the blocks without increasing the triangle count, ensuring the performance does not degrade. Additionally, we re-added some old blocks that got lost (wall with double-window with a pillar, etc.).

Updated Trees:
The trees in Medieval Engineers also got a makeover. There are new pines, new spruces, and oak trees!
Tree cutting has also been tweaked, so go check out those new oaks and don’t forget to yell timber when you cut them down! ;)

Female Engineer:
The female engineer is looking better than ever, as we’ve incorporated some of the features from the Space Engineers female engineer. Likewise, her body proportions look much more realistic.

The grids in Medieval Engineers have received a lot of updates, as we overhauled the entire grid codebase, removed multiblocks, optimized adding and removing blocks (grid splits and merges) on very large grids, simplified many systems, fixed small grids not sticking to large grids, improved block placement along with structural integrity and stabilized physical constraints (ropes, catch blocks, etc.).

We have upgraded the multiplayer behavior, especially with regards to the grids, to ensure they are sent over the network quicker, and fully connected, to prevent grid desynchronization, ropes getting cut, and other horrible scenarios that would cause clients to freak out. Serialization is now much faster in multiplayer. There is also better entity grouping to ensure grids load in together, which combined with lots of minor fixes, should significantly improve bandwidth.


Blueprint Building to Survival:
With the simple click of a button and a few swings with your trusty mallet, players can now add large buildings, such as castles to a survival world, as well as small constructions, including catapults, which are ready for action! Plus ropes and connections are now saved in blueprints. Blueprints now automatically store, and display, which mods are required, so you can always see what you may be missing when you place a blueprint. It also checks for research, shows you the resources needed to build it, and provides an easy way to check your progress. You can now work together with your friends in building your town!

World Chunking
World chunking is a new system that unloads objects that are very far from players. By doing this, we managed to vastly accelerate world loads, particularly for really large worlds. Dedicated servers should also see a reduction in memory usage. On top of this, it removed the need for abandoned grid decay, abandoned grids are usually not loaded into the scene, and thus do not consume any performance anymore. You can go explore servers and discover all kinds of ruins and structures left behind by people!

This vastly accelerates world loads, saves and unloads entities that have no players nearby, thereby reducing memory usage and performance loading. It also removes the need for abandoned grid decay; abandoned grids no longer take up any performance.


Be sure to check out the new main menu, blueprints screen, crafting screen and medieval master screen. Every other aspect of GUI has been retouched to fit this new style for the game. It’s not only visual, every screen also had careful thought put into it about what we want to show, in order to improve the flow of user interaction.

Medieval Engineers has never sounded so good! Lots of places that were missing sound now have sounds. We also improved the sound quality in many instances, and we added effects and filters, such as reverb and low-pass filters.

Under “the hood” of Medieval Engineers, there are rendering Performance improvements and GPU particles. There are also better visuals for sunsets and sunrises, and improved logging behavior to help us catch more bugs.

For our amazing community of modders, we have a nice list of new tools for you:
-Crafting system refactored to support world chunking and more, see this guide for more info:
-ModAPI dialogs
-Dynamic environment system access
-Added support for underground and inside checks to environment rules
-Programmable animation layers (thanks to Equinox)
-Navigation mesh session component (thanks to Equinox)
-Seedbags now support seeding on non-farming voxels and can plant non-farmable items.

While we are working out the kinks in 0.7, it may be worth creating 0.6-based copies of your mod so servers that want to remain on 0.6 for a while longer are able to continue playing without too much disruption.


Last, but certainly not least, we have a voxel hand that obeys landscaping stakes. This was a highly requested feature from the community to fix trouble spots when landscaping.
We hope you enjoy all of these new additions to Medieval Engineers, as we know that we’ll enjoy seeing what you create with them. :)

Thanks for reading!
Keen Software House team
73 comments Read more
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“Medieval Engineers has set the bar for future sandbox games quite high.”

Deluxe Edition

Support the developers by getting bonus digital content. The Deluxe edition includes the standard Medieval Engineers Early Access game plus the game’s Digital Soundtrack and a special bonus banner layer!

About This Game

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. There is an entire planet to explore!

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

Early Access Features

    Medieval Engineers is all about building and the options are unlimited. Build anything from houses and castles to wagons and catapults.
    Change, pick up and interact with everything includes plants, bushes, trees, animals, and the ground itself. Everything is interactable and destructible!
    Make the ground into any shape you want. Use a pickaxe to dig and mine in the ground or use the special voxel tools to reshape the land.
    Play in a volumetric open world environment and explore a whole planet. Find valuable defensible areas or go to battle alongside your allies to take enemy lands and secure resources. The planet is full life including trees, plants, animals, and savage barbarian warriors.
    Build with structural integrity. Make buildings too tall and they will collapse! Design your structures carefully keeping in mind the differences between wood and stone. Use Structural Integrity View to find weak points in real-time. When the supports fail buildings come crashing down in glorious real-time destruction!

More to be added later

Please be sure to read the list of current features before you buy the game. It will give you an insight on what is or isn't actually working:

Performance Notes

Medieval Engineers is in development and undergoing frequent optimizations. The performance will get better. The performance depends on the complexity of your world and the configuration of your computer. Simple worlds run smoothly even on low-end computers, but a more complex world with rich object interactions could overload even high-end computers.
Minimum requirements represent the bare minimum to run simple scenes and don’t guarantee a perfect experience.

System Requirements

    • OS: Microsoft Windows 7 (latest SP) 64-bit
    • Processor: Intel i5 @ 3.0 GHz or higher (or AMD equivalent)
    • Memory: 8 GB RAM
    • Graphics: Geforce 750/Radeon R9 270X or higher
    • DirectX: Version 11
    • Storage: 10 GB available space
    • Sound Card: DirectX® compatible on-board
    • Additional Notes: .NET 4.7.2
    • OS: Microsoft Windows 7 (latest SP) 64-bit
    • Processor: Intel Quad Core i7 @ 4.5 GHz or higher (or AMD equivalent)
    • Memory: 16 GB RAM
    • Graphics: Geforce 1070 GTX / Radeon RX Vega 56 or higher
    • DirectX: Version 11
    • Storage: 10 GB available space
    • Sound Card: DirectX® compatible on-board
    • Additional Notes: .NET 4.7.2

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