Zak Zapper

Zak Zapper is a single player, keyboard controlled, space invaders type of game

The player takes the role of Zak Zapper, one of the very few space soldiers left not yet captured by the invading space army of the dastardly Wolfoid. 

Starting out with basic space invaders game-play, moving right/left across the bottom of the screen while shooting at slowly descending ranks of alien ships, this game evolves as the player collects weapons power-ups from fallen alien ships and as rescued colleagues join in the fight.