This is a wargame of the 21st Century in which you have control of the forces opposing the single enemy unit known as The Ogre. There are ten levels of play.

Your mission is to stop the Ogre from leaving the bottom of the map. The only way to do this is to destroy all its tread units. The Ogre itself is a computer-controlled supertank, which is bristling with weapons. It has missile systems, main and secondary batteries as well as a host of anti-personnel weapons. Each of the weapons shown has attack, defence and range factors as shown in table 1.

The Attack factor is a measure of the destructive power of each weapon, whereas the defence factor is a measure of the resistance of each weapon to attack. Range is the number of "squares" through which a weapon may fire. (The weapon can only fire within its range).

The Ogre is a tread or track vehicle, and the number of "squares" it is able to move in any one turn is governed by the number of tread units divided by 15, e.g. If The Ogre has 60 tread units, it has four movement points, 45 tread units gives three movement points, etc.

Movement is determined by number of tread units (1 at 15, 2 at 30, etc)

Under your command, you have a number of different units (see table 2).

Before play begins, you will be shown what units are available to you and how many of each you have. If you are not satisfied with the mixture of units provided, you may change them.

The map, with craters and The Ogre in position will then be displayed and you will be asked which level of difficulty (1-10).

Next, all your units will also be displayed, in position, on the map, and you must decide who moves first.

Having decided who goes first, The Ogre's current status will appear on the bottom line.