Portal 2 > General Discussions > Topic Details
Legend_of_Link Jun 12, 2013 @ 5:35pm
Professor Portal Achievement Help
If you haven't done co-op in portal 2, please respond to this. I really would like to get that achievement. It doesn't matter if you've done single player or not. All that matters is you haven't done co-op.
Date Posted: Jun 12, 2013 @ 5:35pm
Posts: 0