[tutorial] how to do professor portal achievement in portal 2


Professor Portal: After completing co-op, complete Calibration Course online with a friend who hasn’t played before.


  1. Find a partner who is willing to reset his/hers stats.
  2. He/she has to do this in Portal 2: Go to Options - Keyboard/Mouse - Allow Developer Console
  3. Go to Options - Keyboard/Mouse - Edit Keys/Buttons - Miscellaneous - Toggle Developer Console
  4. Press "~" to open the console.
  5. Type: mp_mark_all_maps_incomplete
  6. Now, all he/she has to do is to host a game.

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