Unlock all other trophies to get this trophy. Congrats!

Story-related, cannot be missed. Unlocks right as you leave the hotel room from the introduction sequence in Chapter 1.

Story-related, cannot be missed. Unlocks after getting dropped into the incinerator in Chapter 1.

Story-related, cannot be missed. Unlocks after you complete GLaDOS Test Chamber 01 in Chapter 2.

Story-related, cannot be missed. Unlocks after you complete GLaDOS Test Chamber 11 in Chapter 3.

Story-related, cannot be missed. Unlocks while you are escaping GLaDOS Test Chamber 21 in Chapter 4.

Story-related, cannot be missed. Unlocks once you resolve the stale-mate at the finale of Chapter 5.

Story-related. Once you get into the Control Room, this trophy will unlock right after you pick up the potato and mount it to your portal gun before the conclusion of Chapter 6.

This can be glitched if you take an alternate path to leaving the chapter without performing the above step.

Story-related, cannot be missed. Unlocks after you complete Pump Station Alpha: Enrichment Sphere 01 in Chapter 6.

Story-related, cannot be missed. Unlocks after you have completed Pump Station Beta: Enrichment Sphere 01 at the beginning of Chapter 7.

Story-related. Unlocks after you have completed Pump Station Gamma: Enrichment Sphere 01 in Chapter 7. Can be glitched if you do not appropriately leave the level by landing on the platform upon leaving the chamber to hear Cave Johnson's speech.

Story-related, cannot be missed. Unlocks after you complete Wheatley Test Chamber 15 in Chapter 8.

Story-related, cannot be missed. Unlocks after completition of the second-run of Wheatley's Experimental Test Chambers in Chapter 8.

Story-related, cannot be missed. Unlocks upon starting Chapter 9 once you land on the platform.

Story-related, cannot be missed. Unlocks at the end of Chapter 9 during the conclusion of the game.

This can be done in Chapter 2, GLaDOS Test Chamber 06. When you push the button at the end of the level, garbage will fly towards you which you can ignore. Ensure your blue portal is setup as shown, then shoot a new yellow portal on the white ceiling above the button. Next, push the garbage release button with . A cube will drop and begin to jump on the faith plates which will go through the portals and in-turn drop onto the button without you having to touch the cube.

In Chapter 3, GLaDOS Test Chamber 10 you will have to complete the puzzle within 70 seconds. Ensure you make a save right when you get off the elevator in case you need to retry and practice the puzzle. This chamber involves redirecting lasers with cubes, portals and utilizing the aerial faith plates. Follow the puzzle solution I have shown to complete the chamber in the allocated time allowed and this will unlock upon opening the door to the exit.

Obtainable in Chapter 9.

You will start out standing over the edge of a pit, and you'll need to use portals to get over to a platform to escape. Once you escape from your nemesis, he will ask you to come back to jump into a pit. Just run back to the platform and fall to your death.

In Chapter 2, Test Chamber 07, after solving the chamber GLaDOS will mention the force field that prevents you from taking items from the chamber is broken. Make a blue portal on the wall of the hallway leading to the elevator. Then ensure you have a yellow portal setup in the cube vicinity to take the cube up to the exit with . This will allow you to attempt to break the rules and go through the broken force field.

Your first opportunity for this is in Chapter 2, GLaDOS Test Chamber 06, after you push the button to release the garbage. Observe where the turret flies as the objects are being thrown in the air. If it heads your way, you can try to catch it. Otherwise it should land on a platform as I have shown in the video. Re-create the portals as directed to make your way to the beginning of the level and drop the turret on the faith plate.

The hidden signal is in Chapter 2, GLaDOS Test Chamber 06. Make a manual save when you begin this chamber.

When you push the button at the end of the leap sequence, trash will be shot your way. There will be a radio in the garbage. Wait until it falls to a platform where you can get grab it. Next, setup portals as I have shown in the video to get back to the beginning of the chamber. Then you will need to make a new blue portal so when you jump on the faith plates again, you will be able to take the radio to the signal in the hidden den.

In Chapter 4, GLaDOS Test Chamber 21 you will find yourself running through a corridor with Wheatley. In which you also unlock SaBOTour along the way. Eventually you will come across a fork in the path where GLaDOS will show you a test chamber with a white heart on the wall. Follow her advice as shown by going left, instead of following Wheatley's instructions.

In Chapter 5, after Wheatley opens the door to the control scanner, you'll need to portal your way inside it. Follow the portal steps presented to remove the template turret from the scanner. Then stand in its place to be scanned.

In Chapter 5, you'll run on a conveyor belt with a bunch of trash. When you walk down the belt, you'll see a turret begging for help. Walk up to the turret, pick it up with and take it with you to safety as shown.

In Chapter 6 you will run into a test chamber with a glass box with a cube in it along with running propulsion gel. You will need to place a yellow portal under the box and a blue portal under the gel to attempt to get the cube to break the glass. Once the box starts to crack open, switch the gel portal over to where the water pipe is as I have shown. If you stop the flow of gel fast enough, at least one panel of glass should be broken with a clean cube in the box. Use the gel that has spilled in the area to jump and pick up the cube for the trophy as it had technically not touched the ground.

Credit to Cornagandarub for discovering this.

Found in Chapter 6, after unlocking Door Prize. In the same office building where you found the last three doors, there's a doorway leading outside to a life preserve and the missing experiment. At 2:33 in the video, is where the experiment is located.

These are all in Chapter 6. There are 6 sealed metal doors you must find and press the intercom button to listen to the message. As they are in different places in the chapter, in this video I will also direct you to where you should see the final set of doors before you leave the chapter.

Obtainable in Chapter 7. You will have to progress from the first room after you used the propulsion gel to leap to the catwalk. Turn left. You'll notice a gate that appears to be locked. Shoot a yellow portal behind this and a blue portal to the wall on the right for a path to this room to locate the portrait.

On Chapter 8, you'll go into a test chamber that says 'Test' on the side. You'll need to walk up to a button to release a cube to solve it. Don't do anything for about 30 seconds and this trophy will pop. Note that this isn't the first "Test" in chapter 8, but the first "Test Chamber".

These are "collectibles" in Chapter 8. As there are 11 monitors in total you must smash. Refer to the following video for the locations and strategies you can use to smash these monitors. Each smash will be saved as you will see a "saving profile" message after each successful smash. So if you miss any during your playthrough, you can always go back to chambers using chapter select to clean-up any missing smashes.

Warning: Video *will* contain spoilers

(Credit and thanks to AyesDyef of YouTube for the video)

The Calibration Course is the very first tutorial course you must complete in co-op. It gets you familiar with how to play Portal with a partner. At the end of the course, you and your partner will automatically high-five each other, unlocking the "High-Five" gesture in the process.

Please refer to "You Saved Science"

Please refer to "You Saved Science"

Please refer to "You Saved Science"

Please refer to "You Saved Science"

After completing the Calibration Course, you will be sent to a Hub World. This is where you will travel around to different courses throughout the course of co-op. At first, only the first course is open, but the further you progress in co-op, the more courses will be unlocked. They will get harder and harder with every new course you go through, as each one builds off of it's predesessor. There are 5 courses in all that you must complete for this trophy. They are as follows:

1. Team Building - There are 6 test chambers in this course, and they are all pretty easy. Here you will learn the basics of portal placement, using cubes, flinging yourself across spaces, etc. You will also learn how to utilize things like the countdown timer for precise movements with your partner. You shouldn't have much of a problem completing this course.

2. Mass and Velocity - There are 8 test chambers in this course. You will be introduced to aerial faith plates, and learn about using precise timing between you and your partner to accomplish a task. Remember you will also have to utilize what you learned in course 1 (such as 'flinging' with portals) in order to solve these test chambers. They start out fairly easy, but they can get a little tricky by the end, especially test chamber 8, where you must redirect a laser into an office building for your partner.

3. Hard-Light Surfaces - There are 8 test chambers in this course. This is the turning point in co-op where things start to get a little more complicated and require you to think more to solve them. You will learn about hard-light bridges in this course, and how to use portals to revolve them at different angles to do various tasks. Some tests can be quite tricky at times to solve, and at the end of the course, you will have to deal with turrets shooting at you and your partner. Overall, just be prepared for the difficulty to ramp up a bit while going through this course.

4. Excursion Funnels - There are 8 test chambers in this course. With all of the turrets, lasers, and bottomless pits in this course, it can be quite difficult your first time through. You will be introduced to excursion funnels in this course, which, when combined with portals, you can use for all sorts of things from floating across a giant chasm to placing a cube on a ceiling button. The test chambers can have many various parts to them, and you and your partner might have to do some trial-and-error if you get stuck somewhere. There's only one more course after this, so keep your confidence up!

5.Mobility Gels - This is the final co-op course in the game. There are 8 test chambers in this course. You'll have to use all of the knowledge that you've learned so far throughout co-op to complete this course. This course contains some of the most difficult and unique test chambers in the game, containing everything from turrets, to hard-light bridges, to excursion funnels. You will also have to make good use of both of the gels you get in this course, as they are the key to solving a lot of these chambers. Don't get frustrated if you get stuck, because there's a chance that you will get stuck a lot in this course. Just keep a clear head and don't be afraid to experiment a bit with what you find in the test chamber, even if it means one of you ends up dying because of it. Once you complete the last test chamber in this course, you will be shown a cutscene, and your trophy will soon pop after.

If you experience any glitches, or this trophy doesn't unlock, refer to this thread:

You Saved Science did not unlock

For this trophy, the cube can never be destroyed, however it can touch the ground. This test chamber is divided into two rooms. The first rooms requires you and your parnter to use all four portals to fling one of you to a ledge. On the ledge is a button you press to get a cube. Catch it using , and put it on the button to move to the next room.

The second room is a bit harder, as one of you has to use portals and faith plates to fly across the room. The other person has to press a button at just the right moment to send a cube through the air. The person in the air must catch the cube and put it on the button for the trophy. This might take a few tries to get the timing right, but don't get discouraged.

You unlock the last gesture at the end of Chamber 4. To gesture, just simply press and use the to select which gesture you want to do. Perfom all 8 for this trophy. They are as follows:

Wave
High-Five
Dance
Laugh
Rock,Paper,Scissors
Take off partners head
Kung Fu
Hug Partner

You can obtain this trophy in Course 3, in Test Chamber 06. Just simply stand in front of a hard-light bridge that is blocking some turrets and perform the dance gesture using the . Refer to the video for the location and the puzzle solution to get to this area:

You can get this trophy right at the beginning of Course 3. It doesn't have to be "goo" neccessarily, as I dropped my partner into water. Just shoot a portal to make a hard-light bridge for them, then have them stand on it and gesture with the . Simply take away the bridge and have them fall for this trophy to pop.

You can get this trophy in Course 4: Excursion Funnels, Test Chamber 9. Towards the end of this test chamber, you and your partner will have to use an excursion funnel to float across a big room. You will then have to drop down to a lower level (near a turret assembly line) and float across the room that way. You will need to use a hard-light bridge to keep the turret from moving your way.

As you keep floating, you'll see that you are heading towards a room with windows. Right before you go past this room, shoot your portal across to the wall where the hard-light bridge is, so that you will start floating to the right of this room. Eventually, you will float right by the secret companion cube. You don't have to land near it or pick it up. As long as you float near it, your trophy will pop.

I got this in the Hub World of co-op. Just place a portal on the side wall of any course and then have your partner stand over the white floor and gesture with . Then just fire a portal under them for this trophy.

This trophy can only be obtained online, and can be unlocked using PSN and/or Steam friends.

After finishing all co-op chamber courses, you will need to play with a "new" PSN or Steam friend whom has never played co-op before and complete the Calibration Course tutorial with them for this trophy. If you can't find a "new" player, then you and your Co-Op partner could each make/use a new PSN account that has never played Co-Op and trade off that way to give each other the trophy.

It is confirmed that you cannot backup and delete your save file to be eligible for the trophy. As you are required to link your PSN ID to Steam, by removing your save the game will re-download your recent save from Steam Cloud. So if you try to join a friend, it will take you back to the hub rather than the Calibration Course tutorial.

You will know you are eligible for this if you get the introduction cutscene before the Calibration Course once your friend joins the invite. For more information on Steam, how to earn this trophy using friends on Steam, or how you can potentially earn this trophy by yourself using your Steam code, please refer to our PS3 & Steam Integration FAQ.

If you need to locate a Co-Op partner, please refer to the Co-Op buddy thread.

In course 4, you will have to use blue excursion funnels to get around. All you have to do is simply perform two gestures with the while floating in these funnels to get this trophy.

In the Hard-Light Surfaces co-op course (Chapter 3), Test Chamber 3 there will be two sections of the chamber to complete. Where you and your co-op partner can only use a total of 5 portals combined for this trophy. The solution to this is using only three in the first room, and two in the second room of the chamber. One partner will need to shoot two portals to create a bridge to the switch and to extend it. One player will need to push to activate the red button on the left bridge, and the other will catch the ball on the second bridge. After that, the bridge will need to be redirected to the exit. This one can be tricky as the player redirecting the portal will likely need to be at the edge of the first bridge to shoot a portal above as shown in the video to create the aerial bridge to cross to the exit.

The second part of the chamber you shoot two portals to create a light bridge wall. Where you will each launch yourselves on the Aerial Faith Plate to "hit" this wall and slide into the chamber exit. It is important to note that you should slightly push the once you hit this wall so that you ensure you slide to the right towards the exit, and not fall to your death.

You can get this in Course 1, Test Chamber 1. Have your partner place both of their portals on the floor, then you must place one of your portals to the left of theirs, and put your other portal right above on the ceiling. Then just fall through and re-align your ceiling portal on the way back up.

It is best to do chambers 2, 3, and 4 in the Mass and Velocity course to get this trophy. Each time you complete a chamber on-time, you'll see the "saving profile" in the top-left of the screen. As you don't have to complete all the courses in one sitting, and you can repeat any chambers as neccessary until you solve them under the allocated time limit. In our video, the trophy will pop at end of second chamber as the last chamber was done earlier in sequence.

For this trophy, you must complete the whole course in one sitting without a single death to you or your partner. The first time you play through Course 4 it can seem challenging. It is full of bottomless pits, lasers, and turrets. The last chamber especially can be easy to die in if you are not careful. Patience and careful understanding of all the chambers and their solutions is the key. Refer to the video for possible strategies to ensure you and your partner do not die at all during your run for this trophy:

At the end of each test chamber, press and gesture with the at the camera on the wall. Make sure you do this at least once for each of the 5 courses. You'll know you did it right when it goes to GLaDOS's viewpoint.

Once you unlock the rock-paper-scissors gesture, select it with and just keep doing it with your partner until you win 3 times in a row. It's all up to chance, so it might take a few minutes to get.

This trophy can only be obtained online, and can be unlocked using PSN and/or Steam friends.

You will need to use the invite feature to invite your friend to your game or vice versa, and either you or your partner will need to press and select the hug gesture with the button when standing next to them. Even if you do not have the hug gesture unlocked yet, getting hugged by your friend will also count (Thanks SandeProElite for this tip). You will need to do this with three different PSN or Steam friends to unlock this trophy. With each successful hug you will notice the "saving profile" message to indicate that hug is saved on your profile as shown in the video.

For more information on how to obtain this trophy using Steam friends please refer to our PS3 & Steam Integration FAQ.

If you need assistance in locating a Co-Op partner, please refer to our Co-Op Buddy thread.

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