You are the commander of a modern tank or 'Drone'. Your task is to patrol the city streets, destroying any Seiddab craft that venture within your range. You are armed with steerable laser bolts. Guide the laser bolts to their targets by manipulating the gunsight. The Drone also has a short range radar display.

Note that the Drone moves forward automatically. When at a junction, its direction may be changed by use of the left/right arrow keys so that it proceeds down another street.

1. By turning the tank, you can avoid many shots completely - and direct other shots onto better preserved pieces of armour. This is more important than hitting saucers in many cases.
2. Fire shots early in anticipation, then guide them onto your target. Don't wait for the gunsight to line up with the enemy before firing - there isn't time.
3. Change direction frequently because the fighters home in on you the longer you stay in the same street.
4. Battle saucers are more trigger-happy than Patrol saucers or fighters. The Hova-robot is very heavily armed and should be attacked immediately it appears.

Initially the display introduces 3D Seiddab Attack and identifies the five types of Seiddab craft. To start the game, press Space or Fire. The upper screen clears to show a 3D view from your Drone as you advance down the street. At the bottom centre is a plan view of the city area provided by your short range radar. Your position is shown by a skull symbol.

The Seiddab craft appear on your radara as steady points of light. They will tend to cluster as they move towards you.

The lower left of the screen shows the number of your current Drone (3 per game). The lower right of the screen shows the current score of each player and the highest score to date.

Arrow keys - Control the gunsight/Change street when at a junction
BREAK - Pause/Restart