Shark

The Purple Priority Warning came from all three stations simultaneously. The Intruders' three-pronged attack had caught the Earth Defence Installations unawares, allowing them to steamroller straight through the token defences and leave them on the brink of complete control.

The emergency session of the United World Parliament was in uproar. Who could save the day? Only one man had the courage, the skill, and the determination, Colonel Charles St John Sharkey, known to his friends as 'Shark'.

'Will you save us?' begged the World President.

Shark didn't have to think twice.

'I'll give it my best shot, Sir.'"

You play the role of Shark, attempting to halt the advance of the Intruders. Your mission is to penetrate deep into their ranks and strike at the heart of the invasion by destroying their Command Centres.

Your first task is to defeat their jungle offensive. Your subsequent missions may not be so straightforward...