Mission 10 - Lone Wolf
There is one data pad to collect in this mission, and can only be collected on legendary difficulty.
Click on the spoiler tag to see the embedded video for this mission:
Collecting all 19 data pads will earn you the following:
I've created a playlist which has all individual missions and their data pad locations: https://www.youtube.com/playlist?list=PLspO7pYM5dalFVnsrpbWe...
Note: you can collect the data pad and reload checkpoint/respawn, and you will still receive the credit for this achievement.