Exit the your room, then head right, before following the corridor round to the left. When you come to the glass doors, turn and break the emergency glass on you left, then pull the lever to open the emergency door. Head down the passage and up the stairs, then round the ledge and ride the lift down to the bottom floor. Head left to the side of the cylindrical thing in the middle, then pull down on the lever to cycle the blast doors. The door on the other side opens, allowing you to move through to the next corridor. From there, head through the next door, then left into the egg lab. Go down the steps, then right and down to the end of the corridor. Press the button with the two thick white lines (to the right of the door) to open the airlock. Pass through it, then head down the corridor into the area containing the ship. Switch to your image intensifier, then move across to the lift on the far left hand side. Ride it up, then go round the corner. Time to meet your first xenomorph. Splat him, then continue ithe room ahead. Go round to the other side of the room and ride the lift up, then head along the ledge and into the corridor. Simply follow the corridor through completely - the turnoffs only contain bonuses on the easier levels. Keep following the corridor until you get to the room with the big pillar in the middle that you can walk through. Make your way over to the other side and pass into the corridor.

Head straight along the ledge, then turn left and look for the lever on the right, in a little "alcove". Pull it and return to the open ledge overlooking the end of the ship. There's a lift in the middle on the right - ride it down then head for the tunnel on the far right. Pass through it, then through the door and into one of the holes in the side of the ship. Head left then ride the lift down at the end. Find the tunnel in this area, then head down it and you'll soon emerge in a waterlogged area that allows you to see into the sky. Head down the next tunnel and ride the lift down at the end. Proceed left then through the tunnel with the four small poles in it, then pass through into the next room to end the level