Portal 2 > - Discussions générales > Détails du sujet
XchocomanX 15 nov 2012 à 14h13
Professor Portal Help
I need help to get this achievment....can anyone help me? D:
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MineCraft lover 16 nov 2012 à 7h46 
which achievment is it?
XchocomanX 16 nov 2012 à 8h45 
Professor portal is the name i have to play the co-op calibration with someone who has never done it before ._.
xXJackPlaysXx 25 jan 2013 à 12h54 
did you do it cuz i will
norill 21 fév 2013 à 16h45 
i would also like to play co-op with someone to get this achievement
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