Portal 2

Portal 2

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1,000

15-20h

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Schrodinger's Catch

Schrodinger's Catch

Catch a blue-painted box before it touches the ground

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How to unlock the Schrodinger's Catch achievement in Portal 2 - Definitive Guide

EASIEST METHOD:

Partway through chapter 6, after learning how to use repulsion gel, you will come to this room. Allow the blue gel to enter the cage, and the box will begin to bounce around. After it begins bouncing and some glass has begun to shatter, turn on the water, and allow the cube to come to rest. Now walk up to the cage and pick up the box. (It does not have to be coated blue!). If you only managed to break the higher window panes, you can restart or use the blue gel to jump into the cage through a higher window pane. You can also use the chance method and allow the box to bounce until it flies out, and you can try to catch it, although this can be frustrating.

Also, available in Challenge mode on "The Fall - Crazy Box".
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22 Apr 2011 18:32

9 Comments
Absolutely brilliant. Great tip!
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By Pedle Zelnip on 24 Apr 2011 18:33
thank you! i thought it was going to take forever for this one!
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By APOLLO2342 on 27 Apr 2011 01:11
If the glass doesn't break, you can also duck under the cage, and grab it from below, through the grating.
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By TS Ghost on 29 Apr 2011 13:58
If one of the upper glass panels is broken, put blue gel next to the cage and hop in.
In any case, this is infinitely easier than chasing it around the room (unless it happens to fly at your face).
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By Firvagor on 01 May 2011 14:59
Great guide. Worked perfectly. Thanks!
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By Comrade Rage77 on 30 May 2011 22:21
Challenge Mode: The Fall - Crazy Box
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By Misinformed DNA on 25 Dec 2011 08:32
This solution saved me a lot of frustration.
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By Iceman2pnt0 on 14 Sep 2014 08:35
Thank you Misinformed DNA, Maka91, I downvoted because you did not have the Challenge Mode name in your description. Add it and I'll change.

EDIT: Thumbs up as promised!
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By Curtieson on 22 Jul 2012 18:05
I have a question. Does this have to be gotten in this specific test chamber? There is a similar thing in the last test of the co-op dlc. Does anyone know if the achievement can be gotten there? Or, can you get the Steam version of this achievement in a custom test chamber designed specifically to get this achievement?
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By RockMan Respect on 07 Mar 2013 20:28
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After failing several times, I was paying attention and once the glass was about to break I turned the water on in the cage.With a panel of glass broken, I used a portal to get on top of the cage and got inside of it and was able to grab the box and it counted.
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21 Apr 2011 06:05

5 Comments
You can't get in the box without breaking the glass to the person above, but anyways to clarify the cube doesn't have to have blue gel on when you pick it up, just that it HAS.
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By English Gamerrr on 21 Apr 2011 11:21
I was trying to do it 'correctly' and I failed at least a dozen times which lead me to try this and got it the second try. First try the cube got clean before the glass broke and got stuck in the corner.

Yeah there is a grate on top of the box that stops you from dropping inside. I was letting the cube get the gel on it, bounce for a second or two and then clean it off. Took probably 3 rotations and entire side was glass free.
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By Twonuh on 21 Apr 2011 14:53
Ah okay, I assumed the top of the box was open since that's how you get the gel inside in the first place, but if there is a grate there then I understand the need to wait for a pane to break.
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By Gen Fire Dragon on 21 Apr 2011 19:29
You may want to make note that you can actually grab the cube from underneath if it is against the side of the box. Through the grate is impossible, but between the grate and the glass counts. This achievement was driving me nuts...
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By Tenshi3 on 23 Apr 2011 21:29
Theoretically, you could do it then without waiting for the glass to break then. I've already got this achievement but if you can get it by cleaning the box off before it breaks out then you could likely get it before the glass breaks to, just drop in some repulsion gel, and immediately move your portal to drop in some water, then follow it in. You'd be trapped in the glass box, but a reload shouldn't be a problem since you just need to grab the box to get the achievement. You don't need to take it anywhere.

Since trying to catch it after it breaks out is fairly random this is actually a pretty good solution if it works consistently.
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By Gen Fire Dragon on 21 Apr 2011 08:16
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The guys at rooster teeth provide a great video guide to the achievement in chapter 6 with the cube in the glass box. Just drop the blue goo into the glass cage. Let the cube bounce around until glass is broken. Once this happens immediately drop the water down into it use the blue goo to bounce up and grab the cube inside the glass cage
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25 Apr 2011 22:29

Chapter 6: The Fall

Note: Save before attempting this.

You will enter a room and there will be a giant glass box with a cube in it. There is also a red button right beside it. You will have to put the repulsion gel on the cube and then the cube will bounce against the glass. Once it breaks though catch the cube before if touches the ground. The cube can bounce against the walls.

Alternative way:

When you cover the cube with the repulsion gel and hear it cracking the glass, shoot a portal under the water so it washes the repulsion gel off and the cube stops bouncing around. Keep repeating this until at least 1 glass wall breaks. There are 8 in total. When a glass wall is broken go to the side it is broken on. Now use your portals to put some repulsion gel near that side so you can bounce into the glass box. Now grab the cube and the achievement will unlock. Even if it is not painted blue.
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Shoot the blue gel from UNDERNEATH the cube. It will start to bounce around inside the cage. Go up and grab it. It doesnt have to be outside the cage.
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27 Apr 2011 14:28

Chapter 6
We're in the middle of a heat wave - it's too hot to be jumping around trying to catch the cube...
1.) create a new save point when you enter the room (just-in-case)
2.) fire BLUE portal under blue gel flow
3.) fire ORANGE portal above cage (there is a black and yellow mark on the ceiling to show you where)
4.) blue gel will fall on cube and it will bounce around smashing the glass
5.) BEFORE it breaks free, shoot the BLUE portal below the water flow to wash the cube clean
6.) fire ORANGE portal beside glass container + fire BLUE portal below blue gel flow (you need a little bounce on the floor to get into the glass container)
7.) jump into glass container and pick up the cube - ACHIEVEMENT will pop up (I've just got it doing it this way)
n.b. if the glass is shattered but still surrounding the cube, just jump at it and it will break completely letting you in.
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24 Apr 2011 11:46

You are introduced to to repulsion gel a little way into chapter 5. Follow the chapter and after getting to the top of some dodgy stairs you'll come across a room with the year 1958 and the number 28 beside the door. Make a new save here!

Now you can do it here legitimately with a good few tries. But there is a way to avoid the hard work and only have to reload a few times..... Set your portals up to drop the blue repulsion gel onto the cube, then after the glass starts smashing quickly change your portals to cover the cube in water. If you get the timing just right you should have smashed the glass and cleaned the repulsion gel off the cube leaving it on the floor of the glass cage. Now simply pick it up from where it sits. Trophy unlocked
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31 Jul 2013 22:25

1 Comment
Don't know why this solution was downvoted. It's how I did it on the X360 and it's how I'm doing it now on the PS3. Thumbs up from me.
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By on 09 Mar 2015 09:35

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.

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22 Feb 2022 00:00

This can be obtained in the sixth chapter, you will come to a room where the cube is imprisoned in a glass cage. Don’t forget to save in case it doesn’t work out the first time. There are two ways, or rely on luck when the cube flies out of its confinement, you need to catch it before it touches the floor.

https://www.youtube.com/watch?v=P8tskLpl8e0

Or do everything purposefully. To do this, make a portal under the repellent gel and above the cage, but as soon as a little current of gel falls into the cage, immediately make a portal under water to wash off the gel and the cube stops jumping. The point is that the cube, jumping inside, breaks some glass and does not have time to jump out of there. Like breaking glass, we jump into the cage, stand in front of the cube and make portals so that the helium gets into the cage again, the cube will jump and then you will catch it.

ht tp://www.youtube.com/watch?v=M6jg_L_RsQ4

Chapter 6

Part 5 (sphere 3)
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20 Jul 2011 04:23

1 Comment
If you do everything purposefully, then when one of the walls breaks and the gel is washed off from the cube, it is not necessary to smear the gel on it again. We grab a regular “clean” one. cube and get an achievement.
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By MoorCATs on 14 Mar 2014 02:48