Codename MAT is a space combat simulator published in 1984 by Micromega for the ZX Spectrum[2] and Amstrad CPC[3] written by Derek Brewster.

[6] Codename MAT, described as a "mammoth space arcade strategy epic",[7] was developed early in 1984 under the working title of Invasion 2000.

The reviewers highlighted the fast 3D graphics, damage system (allowing a ship to limp back to a planet for repairs if the engine is stuttering) and balanced combination of strategy and action.

[4][5] Codename MAT II, also written by Brewster, was published later in 1985 by Domark for the ZX Spectrum,[12] Commodore 64 and Amstrad CPC.

It has a new ship, the Centurion II with two different weapons and a more complex damage system where onboard droids can be assigned repair tasks by the player.

The inclusion of ship batteries, directional shields and reactors requires the player to consider energy management in addition to the overall strategy of defending the system from Myon invaders.