Preservation of Mass Achievement for Portal 2

Preservation of Mass Achievement

Icon for Preservation of Mass

Preservation of Mass

Break the rules in Test Chamber 07
26.80% of players have unlocked this achievement

Guides

We have no guides for this achievement.

Players

Icon for HelloHalo

HelloHalo

Earned on: Apr 25th 2023, 1:57:17 am

AFAK

Earned on: Apr 18th 2021, 6:36:06 pm

Lucas Mace

Earned on: Jul 22nd 2017, 10:22:36 pm

✨ ATHANH ✨

Earned on: Jul 6th 2017, 3:55:26 am

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Valsept

Earned on: Feb 17th 2017, 5:23:37 pm

Lolo Réel

Earned on: Dec 6th 2016, 1:08:39 pm

Kainie

Earned on: Dec 30th 2015, 2:06:36 am

Icon for atslughorn

atslughorn

Earned on: Apr 6th 2015, 8:06:52 am

chip5541

Earned on: Jul 3rd 2014, 7:49:47 pm

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SubjectThrone31

Earned on: Apr 20th 2014, 5:30:35 pm

steezus ⭐

Earned on: Apr 17th 2014, 5:51:19 pm

Weeeevil

Earned on: Apr 30th 2013, 2:12:35 pm

TaD

Earned on: Apr 21st 2013, 3:23:01 pm

AnotherFoxGuy

Earned on: Mar 24th 2013, 11:51:05 am

MuckPie

Earned on: Oct 26th 2012, 1:04:35 pm

Queiroz

Earned on: Jul 24th 2012, 9:21:50 pm

Sellyme

Earned on: Jul 8th 2012, 8:11:41 am

Icon for Shadows of the Past

Shadows of the Past

Earned on: Apr 9th 2012, 6:42:41 am

aspidya

Earned on: Jan 19th 2012, 4:47:37 pm

Naos

Earned on: Nov 29th 2011, 8:40:39 pm