This game, designed by Scott Rogers and developed by Steve Warner, is a 1-5 player co-operative game in which you take on the role of Nostromo crew members Ripley, Lambert, Parker, Brett, or Dallas, all of whom are trying to survive on a spaceship that's been infiltrated by an alien. Executive Officer Kane has already been killed, and as for Science Officer Ash, well, we'll get to him. Here's an overview of the gameplay:
Each turn has two phases. In the Crew Action phase, players creep through the Nostromo's halls, gathering scrap, crafting items, trading scrap and items with other players, and using items and their special abilities. Brett, for example, can craft items with one fewer scrap than other players. If the Alien is within three spaces of the player with the incinerator, that player can use the incinerator to send the Alien back to its nest.
In the Encounter phase, players draw and resolve an Encounter card. The Alien could be lurking behind any corner...
Once the players fulfill their initial objectives, they face one of five final missions, each with a unique set of requirements. Players must fulfill the final mission's requirements simultaneously to win the game.
Each crew member has a number of action points that you use to move, pick up or drop items or scrap, craft items out of scrap, trade with other crew members, use an item (some of which can be used a limited number of times), or take your unique special action.
The encounter cards move the alien around the board, with it always moving towards the closest crew member. If the alien and a crew member are ever in the same room, the team loses morale and the crew member must flee. What's more, the encounter cards replenish scrap in various rooms in the Nostromo, but they can also bring "concealed tokens", which must be revealed whenever someone enters that room. You might find nothing, or the alien might turn up — or Jonesy might surprise you, but don't worry because you can craft a cat carrier to catch him.
Some of the final missions initiate the Nostromo's self-destruct sequence, giving all players four more turns to complete the requirements of that mission before the game ends with a bang. And should you find yourself having an easy time aboard the Nostromo, you can introduce Science Officer Ash to the game, with Ash moving through the ship to remove scrap and force the crew to lose morale.