Portal 2 > Generelle diskussioner > Emneoplysninger
XchocomanX 15. nov 2012 kl. 2:13pm
Professor Portal Help
I need help to get this achievment....can anyone help me? D:
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MineCraft lover 16. nov 2012 kl. 7:46am 
which achievment is it?
XchocomanX 16. nov 2012 kl. 8:45am 
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 kl. 12:54pm 
did you do it cuz i will
norill 21. feb 2013 kl. 4:45pm 
i would also like to play co-op with someone to get this achievement
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