Just Cause 4

*This is story related and should unlock after completing the final Sandstinger mission.*
**Note: This guide is written under the assumption that you have completed all the strike missions and are playing through the story missions now.**

Operation Sandstinger consists of 3 story missions Meeting Lanza Morales, Sandstinger: Train Robbery and Operation Sandstinger.

Meeting Lanza Morales
Fast travel La Mazmorra and return to the cell that held Lanza Morales to start the the mission Meeting Lanza Morales. This mission consists of a cutscene that explains what you will be doing in the next two missions.

Story Mission: Sandstinger: Train Robbery
Proceed to the Sandstinger: Train Robbery marker below Qachas. Once started wingsuit onto the train and enter the gun, shoot down the helicopters and any resistance that you come across. Eventually you will be stopped at a depot where you must access a console before moving again, jump back into the gun and continue defending the train until you're at a bridge you will then be told to separate the cars jump onto the cargo container and shoot the orange coupling connecting the cars. After a black screen you will be in the gun with a 3 min timer and the only objective is to defend the cannon, shoot the helicopters, tanks, other trains and finally the fodder on the ground until reinforcements arrive

Story Mission: Operation Sandstinger
Onto the final part of Operation Sandstinger, You will start on the trains gun just like in the previous mission shoot all resistance and every so often shoot the blockade on the tracks helicopters, tanks and blockades do the most damage. Your engines will stall resulting in a defend the train sequence wit bombers and a circle of helicopters, Once you start moving again there is little resistance before you enter the compound. In the compound shoot all the fodder until the sandstorm hits and go to the console (Don't Fly), After the console is activated follow the red lights on the ground to the cooling systems, there is one cooling system on the console side and two on the opposite side. To destroy the cooling system remove the two yellow panels on each side, shoot the electrical boxes and a rotating cylinder will pop-out the top with more electrical boxes to shoot, head back to the train cannon and shoot the giant rotating sphere generating the sandstorm.

Once the cutscene ends you should unlock