Achievement Details

Preservation of Mass

Break the rules in Test Chamber 07

Preservation of Mass0
3 guides

How to unlock the Preservation of Mass achievement

  • Maka91Maka911,114,298
    21 Apr 2011 21 Apr 2011 20 Aug 2012
    102 2 4
    Chapter 2 - Chamber 7

    Use the third cube to block the laser and call the elevator. Now use the white platforms to bring the box to the pad, and shown in the video. Reach the exit zone, and take the hint from Glados. Shoot a Portal on any surface in the hallway, and take the cube through the other one, unlocking the achievement!

    You can also get this achievement in Challenge mode, playing "The Cold Boot - Pit Flings".

    Guide not helping? View 2 more guides for this achievement.

    Showing most recent comments. View all comments.
    Calex dEUSGood guide, missed it on my 1st play.
    Posted by Calex dEUS on 27 Apr 11 at 18:28
    CurtiesonVoted neg to try to get you to add the Challenge name: The Cold Boot -- Pit Flings.
    Posted by Curtieson on 21 Jul 12 at 20:57
    ジャン ベリオスGood guide! Thanks again Maka 👍👍
    Posted by ジャン ベリオス on 05 Feb 19 at 18:10
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  • DaradusDaradus96,324
    23 Apr 2011 23 Apr 2011
    29 2 2
    Other solutions show you how to do the level, that takes the fun out of the game, instead read this:

    The achievement requires you take your companion cube with you through the door towards the lift so as you walk through there is a wall you can place a portal on. Go grab your cube, pop the other portal, walk through and pop!
    Showing both comments.
    GridEXEPop as in what? The achievement, the companion cube, or both? :(
    Posted by GridEXE on 27 Apr 11 at 19:57
    DaradusWell the achievement will pop, if you try to take it into the lift the cube will then disintegrate, so I guess that's kind of like popping too
    Posted by Daradus on 29 Apr 11 at 00:55
  • 12 3 3
    Chapter 2: The Cold Boot. Test Chamber 7.

    When you place the Companion Cube on the button, place it as CLOSE as you can to the wall and to the right (below the edge). Now continue on and when you are above the cube, go as close as you can to the edge and crouch and grab the cube. Now walk through the door and the achievement will unlock.

    Video credits: Rooster & Teeth
    Showing most recent comments. View all comments.
    I TRU RELIG1ONupdate your video mate
    Posted by I TRU RELIG1ON on 11 Apr 12 at 21:48
    Reported Content edit: Video now fixed.
    Posted on 24 Oct 14 at 15:19
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