S tar Wars appears to have been the main inspiration behind Blade Alley, in which you must fly your ion-driven interceptor along a defensive trench while avoiding or firing at the enemy craft hurtling towards you.
The three-dimensional effects and perspective of the game are realistic, with shadows under each craft adding that extra touch of sophistication, and the player's fighter vessel handles well on either the keyboard or joystick.
You have three lives to enable you to notch a score which might take you from the rank of space cadet to leader and eventually admiral.
The enemy craft prove difficult to hit and although it is possible to stay in the game by weaving your way between them, achieving an impressive score is a laborious and possibly discouraging task.
The game offers six screens, with varying backgrounds and additional hazards such as hopping aliens to increase the player's difficulties.