Endurium is a natural resource in every version of Deadlock. It is a special natural metal found on Gallius IV and can be mined. It is also a raw material used to create buildings and units. Similarly to steel, endurium is five times stronger than iron.

Mining endurium requires the Endurium Mining research. Afterwards, it can be mined in surface mines, mantle drills and sub space magnets. With Triidium Processing, it is possible to process endurium into triidium, which is a metal alloy.