Call of Duty: Ghosts
91 Achievements
2,000
48-60h
Grindin'
Blow the pressure valves on your first attempt.
40
How to unlock the Grindin' achievement in Call of Duty: Ghosts - Definitive Guide
At the very end of this mission (after you got support from your squaddies in the chopper) you will get into a control room. Merrick tells you to move a body away from a console. If you do this you will come to the part where you have to regulate the pressure.
Using the Left Analogstick you have to keep the bar on the console in the green zone in the middle. There will be some static on the console and the bar will move up and down by itself. But it shouldn't be all to hard to keep it in the middle zone. It's also not immediately over if the bar dips below the middle zone or goes above. As long as you're fast on your analogstick you can regulate it and get it back into the zone in the middle. If you mess up you can always just restart the check point.
Important Note by Prezesmaks
This bit is quite important. Please wait for the instruction to appear on screen. Then hold those 3 bars around green colour. If you fail you need to restart mission!! You cannot just reload checkpoint. "...on your first attempt" means it must be done during your mission without failing it (blowing up or going red). Confirmed.
*Note: Video was taken on the 360. I can replace it with a video taken on the One but I don't want to put two copies of each achievement on my YT channel. If somebody would rather see an Xbox One video let me know and I'll happily provide one for you. Thanks for reading*
Note: Grindin Guide starts at 1:14
Chapter Select: "Atlas Falls".
Note: You cannot restart the checkpoint if you fail and will need to restart the whole mission.
Near the end of the mission, you will have to operate a console to shut the water pipes off. What you have to do is keep the bar in the center of the screen the whole time using the analogue sticks. The more water pipes that get shut down, the more the console will shake and flicker, making it harder for you to keep the bars in the center. If you do push it over a little bit, then don't worry but failing will result in you having to repeat the hack from the start.
At the end of the Atlas Falls mission you will need to remove a dead body from the console, you will then need to keep the bar in the green or yellow, as long as it doesn't touch the red you will get the achievement. If you touch the red area you will have the restart the whole mission.
At the end of the Atlas Falls mission you will need to remove a dead body from the console, you will then need to keep the bar in the green or yellow, as long as it doesn't touch the red you will get the achievement. If you touch the red area you will have the restart the whole mission.