Zap Zone is a fast-paced, sci-fi action game set in the year 2050. Earth is under attack from an alien race and it's up to the player to use their high-tech weapons and maneuvering skills to defend the planet. As the player progresses through various levels, they discover that the aliens are harvesting humans to use as experimental subjects for their own purposes. The player can choose to save the humans and gain allies or leave them to their fate and focus on the primary mission.