UPDATE: By the looks of https://www.trueachievements.com/ArkhmInmate0801.htm
's comments, there must be some probability or requirement for Aria and Sadira's playthrough. While we don't discover what 's going wrong, I'd recommend using Riptor in these quests.
This achievement is related to the completion of the randomly generated quest Ultrateck Leak. It is a quest spanned through four turns. It is also only playable by agents of Ultrateck. My playthrough was with Aria, but you may use anyone, although the answers might differ slightly.
I will tell the answers I put to all quests:
Pre-battle: Storm hideout
Pos-battle: Search hideout
Pre-battle: Disable the aria clone (as Aria/Fulgore) or Call Ultratech Security for Backup (as Riptor/Sadira)
Pos-battle: Track hacker signal (as Aria/Fulgore) or Decrypt the hacker's log (as Riptor/Sadira)
Pre-battle: Enter through the back (you will get poisoned) (as Aria/Fulgore) or Ask the Rebels for assistance (as Riptor/Sadira)
Pos-battle: Search for clues (as Aria/Fulgore) or Interrogate the captured terrorists (as Riptor/Sadira)
Pre-battle: Covert assault
Pos-battle: Search the dataframe
Other answers might work so bear in mind these.
For the first three quests, I didn't have much problem in terms of fighting. The problem comes with the fourth. The last mission is a 1 vs 2 very hard battle. Specially, the second part which is against a random character. I recommend bringing your A game here, using artifacts, consumables and best guardians.
After the final answer, the achievement should unlock.
If you have different answers that lead to the achievement, please put the comments, so I can update it. Thanks for SiegfriedX
for his Riptor answers , ParadoxReal8
for corrections, thatNoseyParker
for the Sadira Info and planting42
for the Fulgore Info.