This is a complete achievement walkthrough of The Fall on Xbox One. During this playthrough I unlock every achievement except for "Merciful" which is unlocked at the very end of the game. I explain how to get that achievement near the end.
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30:18This achievement is time sensitive. Once you're in the Labs area, and you've attached the missing Mainframe piece, you will have to press a red button to drain the power from a bunch of robots. For this achievement you have to quickly interact with the button and the start mashing A to activate it. If done quickly, you will unlock the achievement.
If it doesn't unlock, try quitting out to the main menu and loading the save back up.