There are 12 side missions that count towards this achievement. You’ll work towards this when completing the missions in Downtown, Anchor, Rezoning and The View for each of those achievements. The side missions are;
1 – Pigeons Down – Erato
2 – Pigeons Down – Thalia
3 – Break and Entry
4 – Drone Works
5 – Complete Coverage
6 – Gridnode Run
7 – The Metagrid
8 – Caught in the Web
9 – An Ear to the Ground
10 – Top of the World
11 – Finger on the Pulse
12 – Exit Strategy
‘Gridnode: Downtown’, ‘Gridnode: Rezoning’, and ‘Gridnode: The View’ are also listed as side missions but do not seem to count toward the achievement progress.