updated
This portion of IGN's Days Gonewalkthroughexplains how to complete themission There's Nothing You Can Do.
Secret Ending
There's Nothing You Can Do is an optional mission that becomes available after the main story is completed and the credits have rolled. This particular mission is the last mission you will encounter during Days Gone.
In order to trigger this mission, you will need to have completed all previous main storyline missions. While it won't be available immediately, we found that it is simply best to complete other activities around the map while you wait for the radio call to come through.
advertisem*nt
O'Brian will call, asking you to meet him one last time.
Once the call comes through, head out towards the northeastern area of the Cascade region and follow the marker. Upon reaching the marker, a cutscene will play that involves both Deacon and O'Brian.
As soon as the cutscene ends, you will have completed the Finding Nero storyline and will unlock the craft recipe for the Unknown Nero Weapon.
