Adeptus Mechanicus is the technocratic organization of the Imperium, based on Mars. Their faith – the Cult Mechanicus – worships the Omnissiah, the god of machines, which embodies the Emperor. For them, knowledge is sacred and every machine is a relic.

Tech-priests of the Mechanicus are cybernetically augmented humans, gradually replacing their bodies with machinery. Their language – Lingua-technis – is a binary code used to communicate with technology and with each other. Their armies include Skitarii, Kastelan Robots, Onager Dunecrawlers, and powerful Tech-Priests.

The Mechanicus is an independent power within the Imperium, with its own faith, structure, and goals. Their Forge Worlds produce weapons, ships, and titans. While they serve the Imperium, their loyalty is primarily to knowledge – and the secrets they guard can be as dangerous as they are useful.