Terminal Velocity achievement in The Orange Box

Terminal Velocity

Fall 30,000 feet.

Terminal Velocity0
5 guidesOffline Game ModeSingle Player

How to unlock the Terminal Velocity achievement

  • Blue RadiumBlue Radium513,283
    06 Aug 2008 06 Aug 2008
    98 0 12
    To unlock Terminal Velocity, you must create 2 portals directly above and directly below you. These portals must be directly vertical to each other, or you can fall out of your constant fall. which will prevent you from getting the achievement. To make sure that they are perfectly vertical to each other, aim as high as you can, and fire a portal on the ceiling. Now, look directly down, not turning side to side at all, firing the color of portal that you didn't fire at the ceiling below your feet, as low as the game will let you. Once again, make sure that you do not turn left or right while transitioning from the ceiling portal to the portal that is below you. Once you fire the portal below you, you should be in a constant fall. Leave the game sitting there, and wait for about 2 minutes. The achievement should unlock. Before you leave your fall, I suggest you press pause and look at the achievement menu to make sure that you unlocked the achievement before you leave your constant fall as well.

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    Showing most recent comments. View all comments.
    SKORPIONICAlmost hypnotized myself watching for this to pop. After the 10 minute mark, I checked my achievements and it was there, just didn't show in-game.
    Posted by SKORPIONIC on 01 Sep 15 at 01:02
    HaarbergerPut the one on the floor vertically, works even better that way.
    Posted by Haarberger on 14 Jan 16 at 13:12
    WilliamRSPOA@SKORPIONIC same thing happened here, cheevo didn't pop in the screen but I got it anyway
    Posted by WilliamRSPOA on 15 Jul 16 at 02:32
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  • a laundrymana laundryman140,469
    26 Oct 2007 23 Jul 2008
    34 2 0
    Just find a room where you can place a portal directly above and below you. Place them, and come back 2-3 minutes later and you should have it so as long as you didn't touch the floor when going through the Portals.
  • Ham Man 89Ham Man 89917,669
    03 Sep 2011 03 Sep 2011 06 Sep 2011
    30 0 0
    Load Chapter 5, Testchamber 13.
    Walk straight and look into the first far right corner.
    Aim up. Place a portal.
    Aim down. Place the opposite colored portal.
    Slowly walk straight into the portal that is on the floor.

    Make sure that your joystick doesnt move you around while doing this though or you may not fall straight and you will have to line it up again.

    I had no issues and obtained this on my first try.

    If doing this as soon as you get to this point in the story. it should take around 6 minutes to fall the full 30,000 feet.

    Here is a video of myself on Testchamber 13
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