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Browse Xbox 360 Game Cheats




Portal 2 Cheats ""Preservation Of Mass" achievement hint" (Xbox 360)

Game also available for:   PS3  |  PC




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"Preservation Of Mass" achievement hint

On Chapter 2 "Test Chamber 7", keep track of the Companion Cube in this chamber. You may return to get it after using it to depress the button at the end of the level. Ignore GLadOS's comments and carry the cube through the broken "Emancipation Grill" at the end of the chamber and the achievement is yours.

2 years ago

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