This game has you playing the part of a brave detective who must make his way through 'dagger alley'.
You are attacked by different waves of robots, helicopters, aeroplanes and spaceships, to mention but a few which increase with speed as you kill them off.
To top this there is also a mad dog that chases you across the bottom of the screen; if he catches you before you can escape your score is reset back to nought.
In addition you are attacked by a row of tyres, which collect on the screen and descend in an attempt to crush you. These are immune to your fire and must be avoided.
In all, there are twenty-five levels to cope with, nearly every level introduces a new type of object to combat, although their formation and movement does not differ much. On reaching the final level you must attempt to open a safe by guessing its combination (a number between 1000 and 9999).
The game loaded first time without problem, and is compatible with Kempston and AGF joysticks. The high score is recorded but unfortunately the player's name is not. The graphics and sounds are not exactly exciting but the game proves to be addictive. Overall it's a game of fairly good quality but don't be fooled by the title, it's just another version of invaders. Fun to play but by no means a classic.