Medieval Engineers is a voxel-based sandbox computer game set on an unnamed Earth-like planetoid without water that can be explored, mined, manipulated, and deformed.

Large blocks such as walls, roofing and palisades determine structural integrity and may collapse under their own weight if not built carefully or if damaged in an attack.

Small blocks such as timber, wheels for carts and siege equipment, furniture and crafting workstations serve aesthetic, interactive, and/or functional roles.

The player may combine these along with other small-block items to create battering rams, catapults, trebuchets, and siege towers, which use realistic physics based on mass, density, tension, and inertia.

Players can also use hand-tools to [de-]construct large blocks, fell and process trees, and reshape the landscape, leveling for building purposes or digging to mine resources and form defensive trenches and mounds.

The Medieval Engineers landscape is a spheroid voxel-based planet, approximately 10 game-kilometers in radius, which is fully explorable by the player.

It contains high mountain ranges with limited passable areas, deep rocky valleys, varied woodlands, grasslands and fields, desert, and a network of dirt roads, which a player may use to navigate or fast travel if they choose.

The game supports farming of basic seeded plants to harvest additional ingredients which may be combined again for greater player-character benefit.

In creative mode, players are invulnerable and are able to spawn unlimited resources, instantly build tools and blocks, and fly.

After negotiations, Keen Software House agreed to share ongoing maintenance exclusively with two prominent developers in the Medieval Engineers modding community, Equinox and Gwindalmir.

Version 0.2, released periodically throughout May and June 2015, introduced survival construction mode, including the need to gather resources and to maintain the player's various stats.

[4][5][8][20] Version 0.4, released on December 13, 2016, introduced farming (using both a hand tool and mechanical blocks), with the ability to plant items such as wheat, herbs, flax, cabbage, and pumpkins, and later harvest the ripened products.

[6][7] Version 0.6, released on November 21, 2017, introduced a new (replacement) Earth-like planet with new biomes, new resources, tools and mechanical blocks, and research quests.

The world gained regional chunking to reduce active memory usage, new trees and existing trees updated, block visuals gained parallax shading, added blueprints akin to Space Engineers with a Medieval Engineers style, and many improvements to the UI and quality-of-life features.

[27] Along with the official release from Early Access, Medieval Engineers would be updated to 0.7.2 incorporating a few bug fixes and stability improvements.