It is finally time for your physical test, subject 15837. The powerful portal gun technology is now in your hands. Show us what a motivated test subject can do. Prove to us you are the right person for the job. Remember, think with portals. Also make sure to check out Portal 2 for PC & Mac. Click here to download Portal 2 now. Instructions: Use the A, W, and D keys to move Use the left mouse button to launch a portal Press Q to open a blue portal and E to open a yellow portal Press R to close both portals Press P to pause the game

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Portal: The Flash Version
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