The game was programmed by David H. Lawson and its graphics were made by Garvan Corbett and Jim Ray Bowers.
The control method is identical to that of Barbarian which was published the previous year.
The game begins when the main character Drak is teleported into the alien spaceship that is approaching the earth. The objective of the game is to destroy the spaceship by finding certain objects from the ship. When the self destruction is active, Drak has to find an escape shuttle before the spaceship blows up in order to survive.
The game was released for many formats including Amiga, Atari ST, MSX, ZX Spectrum and IBM PC. Obliterator was reviewed in Computer Gaming World as a fun, well-executed action game, albeit not a challenging one. The game was praised for using score not just as an arbitrary value, but also to determine the time left for the hero to escape.
The soundtrack was composed by David Whittaker.