Portal 2 > Yleiset keskustelut > Aiheen tiedot
ChangedACC 3. tammi, 2013 6.18
Professor Portal Achievement
Hi, I am looking for people that has NOT played co op before. That way I can get the Professor Portal achievement.
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GGMerlinNL 3. tammi, 2013 11.22 
im still buzy with portal 1 but after that i wanna play :)
ChangedACC 3. tammi, 2013 12.39 
Ok, notify me when you want to play.
uʍopǝpᴉsdn 4. tammi, 2013 9.42 
I might be ok, depending on your time zone, is it only for the acheivement, or the whole co-op?
ChangedACC 5. tammi, 2013 3.43 
Only for the achievement mostly though I am open for trying out some Custom levels with you. :)
mr_Creepssss 26. maalis, 2013 8.00 
i never played co-op
eric 26. maalis, 2013 17.02 
ok
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