There’s Nothing You Can Do is the last story mission with O’Brian in Days Gone.
Your task is to simply meet with O’Brian as he has something urgent to tell you.
Here’s a walkthrough of There’s Nothing You Can Do in Days Gone.
Ride to the NERO LZ
To begin the mission, go to the Old Pioneer Cemetery, as shown in the map below.
Ride your bike towards the marker on your map. It’s actually the entrance to the cemetery.
After reaching, a cutscene will load. You will see O’Brian here with the chopper.
During the cutscene, he’ll mention again that the freakers are constantly evolving.
He takes off his mask and it seems that he has been infected as well. O’Brian’s warning is that there’s nothing Deacon can do to stop it.
O’Brian then leaves on the chopper, but he jumps right on the chopper, showing his super strength.
The mission completes here. You will earn 4,000 XP for completing it.
For completing the storyline, you will earn an unknown NERO weapon.
You will also get a Finding NERO custom accent from the Finding NERO storyline.
To change your accent, there are a few mechanics (e.g. Lost Lake) that can do it. It’s under decal.