Codename MAT II, also written by Brewster, was published later in 1984 by Domark

Domark

Domark Software was a video games software house based in the United Kingdom. The name was derived from the given names of its founders, Dominic Wheatley and Mark Strachan...

 for the ZX Spectrum

ZX Spectrum

The ZX Spectrum is an 8-bit personal home computer released in the United Kingdom in 1982 by Sinclair Research Ltd...

, Commodore 64

Commodore 64

The Commodore 64 is an 8-bit home computer introduced by Commodore International in January 1982.Volume production started in the spring of 1982, with machines being released on to the market in August at a price of US$595...

 and Amstrad CPC

Amstrad CPC

The Amstrad CPC is a series of 8-bit home computers produced by Amstrad between 1984 and 1990. It was designed to compete in the mid-1980s home computer market dominated by the Commodore 64 and the Sinclair ZX Spectrum, where it successfully established itself primarily in the United Kingdom,...

. It featured a new ship, the Centurion II, which had two different weapons and a more complex damage system – on-board droids could be assigned repair tasks by the player. The inclusion of ship batteries, directional shields and reactors required the player to consider energy management in addition to the overall strategy of defending the system from Myon invaders.

Codename MAT II received mixed reviews. CRASH awarded 81%, again highlighting the mix of arcade action and strategy, but criticizing the average graphics and confusing instructions. Sinclair User awarded 3 out of 5, whilst Your Spectrum's average rating was only 6 out of 10, finding that whilst better than the original Codename MAT, it did not compare favourably with Elite or Starion.