This trophy is earned by having everything available for your use from the Rebel Drop menu. This includes:
All vehicles that are unlocked by bringing them to one of Mario’s Garages
All vehicles and weapons unlocked by liberating military bases and outposts
Both weapons and the plane unlocked from collecting vintage parts
The portable mortar unlocked from collecting all tapes
The golden helicopter unlocked from collecting all tapes
The vehicles unlocked from completing Daredevil jumps
The helicopter unlocked from finishing the story
This will come while working on earning the game’s 100%, as this is almost everything that is required for it that isn’t challenge related.
Note that DLC vehicles and weapons are not required for this trophy.Some of the vehicles may fail to unlock if the player liberates locations tied to the vehicles too early in the story.