Introduction

Welcome Shock Trooper Squad Commander. Our intelligence sources have intercepted a coded message that says Aliens are planning to conquer earth.

Your mission is to infiltrate the Alien Base and destroy it. You must also escape with the parts for their new TRG-5 Space Saucer and return them to our Scientists for analysis. Four highly trained Shock Trooper will be placed under your command for this mission, each Shock Trooper is supplied with the latest in attack equipment.

Enemy Defences

Lasers
The Alien Base has two types of Laser the first emits powerful Energy Bolts that can kill, destroy them with your Electro Gun; the second type is a Rotating Laser which can be stunned but not destroyed, shooting one of these will stun all of them off the screen. Laser Mirrors reflect Enemy Bolts.

Zaproids
Robots that enter through openings in the ceiling and move downward - don't go near them as they can electrocute you.

Force Fields
Certain passages are blocked by wave-like force fields to eliminate a force field, you must destroy its power generator with your Electro Gun.

Filter Grids
Some tunnel sections have filter grids attached to the floor and ceiling, your Electro Gun will not operate in these tunnel sections.

Terminators
Walking Robots that beam onto the screen and attack with a high powered Laser - defend yourself with your Electro Gun.

Particle Emitters
The most important areas of the base are protected by rows of ceiling mounted emitters which drop radioactive particules. Being hit by a particle raises your radiation level drastically.

Radiation

Your radiation exposure is shown by a bar meter at the top left corner of the screen the level increases whenever enemy lasers fire, each time you fire the Electro Gun or use the Inviso Device, or if you are hit by a radiation particle. Your Shock Trooper will die if the radiation level reaches the area at the top of the meter. There are three decontamination chambers where your Shock Trooper's radiation level may be reduced to zero, if the door does not open as you approach, you must have failed to set a Bomb on one of the previous screens, enter the chamber to be decontaminated, receive your bonus and one of the specially miniaturized Space Saucer parts. Press the Joystick button when all action stops to continue your mission.

Captured Troopers

The Aliens have captured many brave Troopers and doomed them to special brain-draining chambers throughout the Base. Each chamber must be disabled to prevent the Aliens from obtaining vital secrets - moving past a chamber causes a brain-drain system to stop functioning.

Scoring

Score and High Score are displayed at the top of the screen. The number of Shock Troopers remaining is shown at the top right.

Bonuses for Entering Decontamination Chambers

Receive an additional bonus determined by the amount of radiation on the meter; this bonus decreases as the amount of radiation increases.

The game consists of 14 screens that become increasingly more difficult and interesting; the bonus for collecting all the Spaceship parts, assembling them on the launch pad and successfully escaping is 10,000 points and an extra Shock Trooper.

Special Control Keys

BREAK - End Game, P/R - Pause/Restart

If you cannot move - it is because the surrounding ledges or anti-gravity disks are too high, then you can jump upward - move the joystick slightly off centre so that the Shock Trooper is facing the desired direction and press J.