Alien Trilogy Walkthrough

General tips:
Don’t waste your ammo as you may find yourself running on empty. Use the 9mm pistol to take out facehuggers & chestbursters. Save the shotgun & heavier weapons for the larger enemies.
Try keeping your distance when firing on an alien. The spurting acid will reduce your energy. Also, don’t walk over dead aliens, & keep away from explosions.
Before each mission, read the objectives you are presented with. Be sure to carry them out.
If you get stuck somewhere, activate all switches in the area (This should activate a lift or a door to somewhere).
Shoot all striped crates & dark coloured lockers, they contain items & power-ups.
Hidden areas or items can usually be identified on the mapper by a blue colour. Blast through secret walls with grenades or seismic charges.

Level Guide:
This guide will provide you with most of the steps needed to complete or find the exit to each level in the game. Keep in mind however, that in addition to those steps, you may also have to carry out other 'mission' objectives, to successfully complete a level (e.g. A mission may require you to kill all of the aliens in a particular area. In such a case, follows the steps provided here as well as killing all the aliens in that area).
Note: Between stages, you will sometimes encounter 'bonus levels'. They allow you to restock your ammo & energy supplies while making your way to the exit within a certain time limit. These bonus levels are not included in this guide as they are too basic.

Section 1: LV426 Colony Complex:
1. Walk straight ahead making 2 left turns until you are faced with a barricade of barrels & crates. There is a door on the left & right. Open the door on you left after flicking the switch on the post in front of the door. Go in the room, get the mapper & activate the switch. Now go back outside & open the door on the right-hand side. Inside you will find the shotgun, which is what you need to blast your way through the barricade. Go back outside & blast through the barricade in front of the 2 doors. Walk straight ahead, through a door, into the next area. Keep going straight & you will find a battery that is surrounded by crates, in front of a door. Collect the battery & go through the door. This path will lead to the exit door. Activate the switch next to the door & exit.
2. Begin by walking to the right & after you go up the stairs on your first left turn there is a barricade. Blast through it & walk to the end of the corridor, then up the stairs to your right (Through another barricade), & then go through the first door on the left (To open this door, activate the switch opposite to it). This leads to the junction room. Go there & activate all the switches, collect the battery & the seismic charges from the crates. Now leave the junction room. When you’ve gone back up the long stairs, turn left & take the first left turn down the stairs, through another barricade. Then go in the first right turn & enter the door on the right. Activate the switch inside & go back out to the other door on the left. Go in & activate the big switch. Now just make your way to the exit door, using the mapper. It is opposite the door you first emerged from, in the south. (Secret – there is a temporary wall in the northern part of this level. It can be distinguished on the mapper by a blue line. Blast through it with the seismic charges & you will find the flame-thrower).
3. Walk straight & on your first right make a turn. This leads to the rec. area with a pool. Find the switch on the far end & activate it. Now go back to where you started. This time walk straight & on your first left make a turn. Go up the stairs, follow the path, take the first turn left, then go right through some barricades. This will lead you to another switch, activate it. Now go back to where you started & this time walk straight ahead through any doors until you come to a blue room with switches. Activate them. Now leave the switch area, heading back in the same direction you came from, & turn right, into the personnel area. This path leads to the exit.
4. You begin this stage at the end of a corridor; the exit door is at the other end. First you must collect the ID tags which are – *Hidden in a locker in the first passageway on the right. *Hidden in a stasis chamber in the room which is in the passageway. *Hidden in a locker in the first room on the right. *In the room on the left. *On one of the 2 guards at the end of the main corridor. Next, get the battery from the 2^nd room on the right, & activate the exit switch, which is in the room on the left. Now make your way to the exit.
5. Turn left at the first opportunity. Walk straight until you pass a tall column. Then turn left into area 4B. Shoot the crates & collect the batteries. Go back out & continue walking straight in the direction you were before, (You should pass some red barrels) until you reach a wall. Go left (you should pass some alien eggs) until you reach a switch. Activate the switch to bring down a lift on the other side of the wall (the lift is parallel to the switch & is on the other side of the left wall). Quickly run to the lift as soon as you activate the switch, or you might miss it. Take the lift up to the room with 2 switches. Ignore the switches. Run past them to the big switch at the end of the platform (Run because the platforms descend as you walk on them). Activate the big switch, then make your way back to the original starting point (It’s in the NW on the mapper). Walk straight up the stairs on the right. When you get off the stairs, go to the forklift on the right. To the left of the forklift is an area marked 4B. Activate the switch there & quickly go back to the forklift. Get on the forklift, it will levitate you to a higher platform. Head left & keep walking until you go down some stairs. Walk straight ahead & turn right when you reached the armoured car. The exit door is ahead.
6. Walk straight & go up stairs on the right. Get the battery. Come back down the stairs & turn right. Walk straight ahead & take out the 2 synthetics using grenades or seismic charges. Activate the switch in that area. Now go back to the original starting point (The lift) & go down the stairs. Turn right & blast through the wall that says ‘stand clear’. Get the battery. Now head in the opposite direction, down the corridor to the area filled with eggs. Destroy the eggs before they hatch. Now make your way down the platform surrounded by flames. At the end of it, there is a steaming jet on the left & a flaming jet on the right. Take the right path, it will lead to the exit.
7. Most of the ID tags can be found on cocooned people hanging on the walls. You will hear them saying ‘help me’. There is one on a wall when you just emerge from the lift. Shoot them & the ID tag will pop out. Begin this stage by walking right & collecting the battery. Blast the wall behind the battery & go through the hidden door. Activate the switches & get the mapper. Now go back to the start & this time walk straight ahead. Blast through the walls to all of the hidden rooms (Walls that can be penetrated show up as a blue line on your mapper). Most of the ID tags are in the hidden rooms. Next, make your way to the cocoon storage area & blast all the eggs. There is a door in the storage area. Go through it & turn into the 2^nd tunnel on the left. It leads to a door with a battery inside. Get it & make your way to the exit door (The switch, which activates the exit door, is opposite the exit door, on the other end of the corridor).
8. Destroy the eggs & kill the queen bitch. Then make your way to the exit.

Section 2: Prison:
1. Go down to the main corridor. Walk left till the end of the corridor & go through the door on the right. Get the mapper from one of the desks. Now leave the room & walk back down the corridor taking the first turn left. This leads to the shuttle room. Destroy all crates & collect the battery from one of the crates. Now go back out to the main corridor & head left until you reach the exit door with a switch next to it. Activate the switch & exit.
2. As soon as you emerge from the lift, turn left & blast through the glass. Walk straight ahead & go up the stairs on the left. Walk right until you encounter some striped crates. Blast them & get the battery. Now turn around & walk in the opposite direction & turn right when you reach the wall. Walk straight & enter the room full of television screens. Activate the ‘big’ switch. Now leave the room & head left. The exit door is the last door on the right.
3. Go straight & take the left pathway. Walk straight ahead & left down the stairs. Shoot the crates & get the battery. Keep going straight until you reach a switch. Activate it & start heading back the way you came. After you go up the stairs, stop on the platform surrounded with stripes & 4 red lights. It will levitate you. Once the lift stops, walk right & there should be a door. Go through the door & activate the switch. Now go back to the original starting point (Where you first emerge when the stage begins) & this time take the right pathway. Repeat the same procedure as you did on the left pathway. That is, find the switch to activate the lift on the right hand side. Catch the lift up & go left instead of right. Quickly find the door, activate the switch & immediately run back, past the lift you came up on (before it goes back down), until you reach a platform with a switch on each side. Stand on it & it will take you to the exit door.
4. Go straight & take the first turn on the right. Get the battery from a crate & activate the switch in the room you encounter. Also get the mapper off one of the desks. Now go back out to the corridor & keep heading straight. Turn right at the end of the corridor & you will see a switch behind a flaming jet. Activate it & ride the moving lifts to the right platform (No. 1). Explore that area & activate all the switches in the hidden rooms (Blast the walls in the room full of red barrels. You will find a hidden room full of switches. Activate them). Then come back to the moving lifts & proceed to the next platform, which will lead to the exit.
5. Get out of the lift & walk down 2 small lots of stairs. Then turn left & keep walking straight ahead, over some stairs, until you reach a door. Go through it into a room full of red barrels. Get the battery from a crate in this room. You can also get the mapper from a room within this room. Next, leave this room & head back the way you came, over the stairs & take the first turn left. Walk until you see a switch behind some crates on your left. Activate it & cross the platforms on the water to the next room. Activate the 2 switches in that area, then head all the way back to the original starting point (Where you first emerge when the stage begins). Take the pathway directly in front of the stairs & it will lead you to the exit.
6. Take the right path to a room with some eggs & caged aliens. Get the battery & activate the switches. Now go back to the start & this time take the left path & activate the switches inside the room with aliens & broken steam valves. Now go back to the start & finally take the middle path. Get the battery from some crates along the way & head to the room full of eggs & furnaces. On the far right side of the wall opposite the stairs there is an orange coloured section of wall. Blast through it & you will find the exit room. Activate the switches inside & exit.
7. Start by going straight ahead until the end of the corridor. Then go right, left, right till the end of the corridor & right till the end of the corridor again (You should have entered a cave-like tunnel). Now go through the first door on the left. This leads to a room full of eggs & switches. Destroy the eggs & activate the switches. Now leave the room, but don’t go through the door you came in from. Use the other door. Get the battery as you go through the door. Walk straight ahead until you reach the wall, then left, left, right, right, right, left into the 1^st pathway, right, left into the 3^rd pathway & left into the 1^st turn. This leads to the original starting point. The exit door is there with a switch next to it.
8. Destroy the eggs & kill the queen bitch. Then make your way to the exit.

Section 3: Derelict Spaceship:
1. Walk straight ahead, through a transparent curtain until you reach a wall. Turn left & walk straight as far as you can. Turn right & walk straight, through another transparent curtain. Just after the curtain, there is a wall that you can walk through on the right. Walk through it & activate the switch. Go back out & continue walking straight again, then go left & catch the lift on the right. It’ll take you down. Get off the lift & head right. Another wall that you can walk through is just on the left. Go through it & activate the switch. Go back out & walk in the direction you came from, past the lift. You will encounter another wall that you can walk through on your left. Go in, activate the switch, then come back out & continue walking in the same direction. You will reach another lift, get on it, it’ll take you down again. Now walk in any direction (The path is circular, so it doesn’t matter). Look for a section of the path that looks like a square. It is a lift. Stand on it for a few seconds & it will lower you to the exit.
2. Simply go around trying each door in the circular path. One will open for you to exit (Make sure you kill all the aliens in the area).
3. Follow the path until you have the option of going left or right. Take the right path & activate the switch you come across. Now go back & take the left path. Find another switch & activate it. Now drop into the canal directly to the left of the switch. There should be a switch on your left. Activate it & immediately follow the canal path, taking the first right you can. This will lead to an opening in the canal, leading to the hidden lairs (You have to get there quickly before the opening closes). Work your way straight through this area, until you reach another switch. Activate it to open up a path leading to the exit.
4. Simply go around trying each door in the circular path. One will open for you to exit (Make sure you kill all the aliens in the area).
5. Walk straight ahead, until you reach a group of orange egg-type things. Blast them & slowly walk forward. The section of floor you’re standing on will lower you down. Kill all infected people in the lower level (& collect ID tags), then come back up by stepping back onto the platform that brought you down. Continue walking straight again, until you reach a 3^rd group of eggs. Once again you will be lowered. Kill everyone down here & make your way back up by turning right into the neighbouring room. This path will take you back up, now continue walking straight & the exit is straight ahead.
6. Simply go around trying each door in the circular path. One will open for you to exit (Make sure you kill all the aliens in the area).
7. Walk straight, a lift will lower you down. Follow the path & you will be lowered again. Continue until you go down a ramp, turn right & go down another ramp. When you reach the bottom of the ramp, turn left. Walk along & there is a wall that you can walk through just on your right. Go in & activate the switch. You will be taken upward. Then go straight & you will fall down a steep ramp with blue flashing lights. Go right & walk along the path. You will fall into a room filled with eggs & enemies. Walk into the next room, which is separated by a thin, transparent curtain. Activate all the switches in the room, the exit door will open.
8. Simply go around trying each door in the circular path. One will open for you to exit (Make sure you kill all the aliens in the area).
9. Walk straight ahead, turn right into the room full of eggs. Destroy all the eggs & go through the door at the end of the room (It’s surrounded by orange egg-type things). Follow the path to the next room full of eggs. Destroy all the eggs & go through the door surrounded by orange egg-type things. This path will take you to another room of eggs. Destroy them & go straight out the door. Follow the path to the final room, the exit door is straight ahead. To open it, activate the 2 switches on one end of the room.
10. Simply go around trying each door in the circular path. One will open for you to exit (Make sure you kill all the aliens in the area).
11. Destroy the eggs & kill the queen bitch. Then make your way to the exit door, which is behind the queen’s giant worm-looking egg processor.

Game Over