While you try to build Quanmexlin, die in front of six different people.
List some of them
At Boardwalk Books in 1993 (Liam)
At the Knox residence in 1993 (Evelyn)
At the Beach in 1993 (Marla)
At the Commonwealth Hotel in 1977 (two visitors)
Check the clock. When there is four minutes or less, change the location to one of the above. When Fia arrives, she will die in front of the witness.
I need a sixth one
You have done it in front of the six physical beings.
Who is the sixth?
Nozzo.
How do I do it?
While on the phone with Nozzo.
How?
Arrive at some place, preferably without others, when you have only a couple of minutes left.
Start talking with Nozzo about topics. Try to save those actual topics if you are collecting the "More Like Nozz-NO" achievement so you don't have to ask him "Any thoughts?". Discussing with Nozzo will spend minutes and Fia dies in front of him.
Achievement help
This is the guide for "Witness me!" achievement in Old Skies. At Nice Game Hints you get hints even on the achievements. Click the big button below to get your first hint on getting this achievement.