Portal 2 – Preservation of Mass Achievement/Trophy [Guide]

portal2
Apr
25
2011

Preservation of Mass
Break the rules in Test Chamber 07

Watch the video here: Preservation of Mass Achievement/Trophy Guide

You must bring the Companion Cube at the end of the level. This can be done in single player mode in Chapter 2: Test Chamber 07.

At the end of Test Chamber 7, place a portal inside the door, then go down pick up the Companion Cube.


Create another portal below, jump right down through the portal then you will find yourself in the hallway at the end of the level.

This will earn you 20G points for the Xbox 360 and a Bronze trophy for the PlayStation 3.

Watch the video here: Preservation of Mass Achievement/Trophy Guide

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