Puzzle 19

Walk out of the lift and you’ll notice two sloped tiles to the left. Place the first portal on the sloped tile on the right.

Wait for the light ball to be shot down from the roof and after it bounces off the sloped tile on the right place the second portal on the sloped tile. The light ball will bounce off the wall and go through the portals to the receptacle above the right sloped tile. This activates a moving platform.

Quickly jump on the platform, duck under the pipe and jump onto the platform in the corner. A closed door is in the path of the moving platform. Use portals to get over to the alcove on the left a little quicker.

Press the red button to open the door and shoot a portal through to the other side. Place a portal next to you and wait for the moving platform to catch up. Jump onto the platform when it moves past the portal on the other side of the door.

A light ball is bouncing between the walls in the next corridor. Place a portal where it hits the wall and the other portal somewhere out of the way to get rid of it. Around the corner there’s a barrier in the way. Place a portal on it and one just to the side behind it.

Go through the barrier and get back onto the platform. Around the corner the platform will move into an incinerator room. When you get close to the fire place a portal on the wall above the ledge ahead.

Place a portal on one of the walls to your left or right once you enter the room and quickly jump through. This is the end of the puzzles.

Finding GLaDOS

To escape from the puzzle room you’ll need to fling yourself across the fire to the ledge on the other side. Place a portal up high in the back wall and another on the ground in front of it. Drop through like you’ve done in other puzzles to fling yourself across.

Follow the path to the left and go up the stairs. Open the door at the top and go up another set of stairs. Place a portal on the other side of the fence and one on this side then go through.

open the door and go through to a room with large fans. Place a portal behind one of the fans and go through to the other side. Both fans lead to the same area.

Place a portal on the wall on the other side of the slime pit and go through to make it across to the other side.

The door here is locked. You need to make it to the walkway on the other side. Place a portal at the highest tile on the other side of the room and one on the floor behind you. Drop down the portal and you should land on the walkway.

Go through the door into the office area and have a look around but there’s nothing to do there. Instead walk across the walkway and once you get to room on the other side look to the right. You’ll notice a red arrow in the corner pointing upwards. You need to place a portal right at the top of the wall above the red arrow. Place another portal on the ground and fling yourself across to a higher room.

Walk up the stairs and jump over the railing. Get into the cracked tube and you’ll be taken through the cube. Drop onto the hatch at the end of the tube and it will break open. You’re back in one of the old puzzle rooms.

This puzzle is a little tricky without a cube. Place a portal through the small square window on the roof directly above the red button. Place the second portal under one of the pieces of the hatch that broke off. If you’re lucky it will land on the red button and trigger it. There are four broken pieces so if the first one bounces off the button try again until you get it.

When the door to the level exit opens go through and drop down the elevator shaft. Place a portal on the elevator landing and the second on the underside of a floor through the fence, shown below.

Go through and jump onto the pistons. Stand on the top one, turn around and place the first portal on the top side of the floor.

Crawl back under the landing and jump up through the floor to appear on the top side. Look around and in one corner you’ll see an arrow pointing to the left. Jump onto the piston and ride it across to the ledge with the arrow. Place a portal through the grating and then ride the piston back to the first landing. Place a portal on it and drop through.

You’ll land on a tube in a small shaft. There is one opening about midway up. Place a portal either side of it and above slightly so you can jump across to the opening.

Walk around the corridor to a room with extremely large pistons. Ride up one of them and place a portal through the corridor at the very top where a ladder used to be. Be careful not to get squashed between the piston and the roof!

Follow the corridor down to another room with pistons and ledges. Place a portal above the horizontal piston up and to the left and the second portal above one of the vertical pistons that are squashing the underside of the ledge to the right. You’ll be able to jump onto the small piston and ride it through the portal to land on the larger piston above.

Jump off the pistons onto the white floor and look up. On one side at the very top are white tiles. Place a portal up on the wall near the roof and one on the ground. Use them to fling yourself across to a high ledge.

Place a portal through the small pistons and another on the wall. Go through to the other side.

Once more place a portal on the other side of the vertical pistons to get to the other side.

In the next room you’ll need to climb your way up a shaft of pistons. On one wall at the bottom is an arrow pointing the way. You need to get high enough so that you can place a portal on the floor in the room above.

Follow the red arrow to drop down to the tube. Drop down to the lower tube and go through to the piston. Place a piston on the wall above the where the piston hits and the second in the previous room. You’ll need to jump across the acid pool to make it through the portal and time it so that you land on the piston while it’s extended.

Walk across the piston to the ledge. Follow the arrow and drop down the hole. Follow the corridor to a room with pistons. They’ll retract as you walk on them and you’ll drop down to a trapped room below.

You only have a short amount of time before the doors open and guard droids start targeting you. Place a portal on the wall next to you, wait for one of the doors to open and place a portal behind the droid. Go through and take out the droid. You can duck down behind the barrels if you get stuck.

Do the same thing for the other two droids. In one of the rooms is a claw with a red arrow above it. look through the hole and place a portal somewhere on the other side and go through. You’ll land in a room with a tube and ladder.

You can ignore the droids on the other side of the fence. Place a portal on the wall next to the higher walkway and jump across to it.

Follow the red arrow to a small hole and drop down onto a droid. Push it aside and the door will open. Drop down into the large room with the ramp. Place a portal on the top side of the door that just opened and another on the floor. Use the portals to fling yourself across to the ramp. Go through into another office area.

Go through what appears to be a level exit and open the door. Press the red button to activate a turret. Wait for it to shoot the glass and break it so you can get into the room. Let it shoot the glass on the other side and go through.

Continue through the office and open the next door. You’ll come to a room with glass and pistons behind it. To the left you can see another arrow. Place a portal oppisite the glass and go back and place the second portal in sight of the turret. Stand in front of the portal so that the turret shoots through the portal and breaks the glass in the inner room.

Follow the arrow and you’ll see a tunnel that’s too high to jump into. You’ll need to pile up items so that you can climb onto them and get into the tunnel. Use office chairs, computers, etc.

Jump onto the items and then into the tunnel. Place portal below the fan on the other side. Come back out of the tunnel the way you came, place the second portal somewhere and go through.

Use portals to make your way down what appears to be a sewer system. On the other side you’ll see an arrow pointing up through a grate. Place a portal through the grate and go through.

Portal up to the ground section of this large room and all of the doors will open. It’s a trap! Guard droids will target you from all sides.

Place a portal behind one of the droids and in the wall next to you. Go through and take out the droid. You’ll need to do this for all of the remaining droids.

When you are done place a portal on the raised door and one on the floor beneath it.

As you are flung up into the air place the first portal on the higher raised tiles. Place the second one on the ground beneath it and fling yourself across to a large corridor.

Two droids will drop down. Place portals underneath them to get rid of them. Place a portal under the hole where the droids where. Go back to the large room, drop down and place a portal beneath you. You’ll fly up through the hole to land in the next room.

Place a portal on the wall above the walkway above and go through. Walk across the long walkway and open the door to the offices on the other side. Go up the steps and through to tunnel to GLaDOS.

Final Battle

As GLaDOS chats away a piece of her will fall off. The way to defeat her is to through all of the pieces into the incinerator. The small room to the left as you enter houses a small red button that opens the incinerator hatch. Place a portal near the incinerator and one near to the red button to move between them quickly.

Once you destroy the first piece of her she’ll get angry and a turret will rise up from the floor. You need to place portals so that the missiles shot from the turret will hit GLaDOS. The spot on the wall just under the timer is where you need to place the second portal.

Each time GLaDOS gets hit a piece of her will fall off. Continue doing this until she’s destroyed. The pieces of her will land in different places each time. Eventually the place will blow up and GLaDOS will be destroyed… or is she?

Congratulations on completing Portal! Stay tuned for Portal 2.