Based on the science fiction movie "Aliens" from 1986. After the contact got broken to the base on LV-426, Ripley and a group of soldiers make their way to this planet. While the Electric Dreams version of Aliens is a simple action game, Activision version varies with a different kind of mini games which are related to the movie. You must recognize the equipment for this mission, you had to land the drop ship to the base, you must explore the base and defeat evil aliens.

Ripley returns to the Aliens' planet with a squad of crack Colonial Marines in order to find out what's happened to the colonists sent there. It's your task to control her and the squad to penetrate the Acheron base and rescue the survivors - if there are any...

The action takes place in first-person perspective, with you seeing the view though the helmet camera of Ripley and the five Marines. You can move the sights of your Pulse Rifle to track the aliens or to turn around in the room - the camera follows the gunsight.

As well as the main display, the console below displays the status of the six team members. This monitors the life status of the members - as they near exhaustion, the status bar flashes and if an Alien is in the room with them it changes colour. The number of the room occupied by that character is also given. In the centre of the console is the current character, with a bio-functions trace on the left and the remaining ammunition on the right.

You can move around by using the doors - move the gunsight over the doorway and press fire to pass through. Rapid movement can be made by ordering the character to move up to nine room to the North, South, East or West. Drawing a map is obviously a good idea here!

If an Alien comes out of hiding or enters the current room, a proximity alarm sounds a warning. You have only a few seconds toshoot the Alien before it makes a meal of your forehead... When this happens, the viewscreen dissolves into static as your character dies. If a team member is not under your direct control when he or she meets an Alien, he/she is captured by the Alien and impregnated - the status bar turns yellow. If the character is not rescued quickly, he/she will soon die as a chestburster hatches.

Ultimately, in the depths of the base, you may meet the Alien Queen in her brood chamber. She will be well guarded...