- For this Gunpoint achievement you need to choose some specific choice in game to unlock it
- You CAN'T replay some missions, You have to complete the missions in the same walkthrough without replay an old save
- It took me 30-45 minutes to unlock this achievement it's very easy when you know what you have to Do.

In this mission "Rooke: Three For All" you just have to get spotted by the camera.

After you just finished "Mayfield: The Collins Case" choice to tall Mayfield
"Yep, but there's nothing on it"
or
"Nope, it was gone."

After this mission "Mayfield: The DataSec Recording"
Tell Mayfield
"Yep, here's what I got off the servers. (Random garbage)".

After Mayfield: The Suspect tell Mayfield :
"Nope, the place was clean. Only thing this guy's guilty of is great taste."

Finally, in Mayfield: The Room
DON't get caught by any cameras.
and after you finished this mission tell him
"(Lie) Nope, there was nothing on the terminal"
and then
"Good luck proving it with the inadmissable evidence I stole for you"
then either
"I hope you have a good morgue. And I've been there, you don't"
or
"Logically though, shouldn't you hope I have a bad one?"

This is the only way that worked for me.
Hope you have done everything right and you have got the achievement.