Death Stranding Episode 4: Unger is a short, very story-driven mission that drops in suddenly after completing Episode 3.
Unlike other, more open parts of the game, this takes you to a unique, closed off area, and so you'll have to complete it to find your way back.
It has two principle objectives - escape the battlefield, and the trickier find the mysterious man.
If you're looking for more from the critical path, our Death Stranding walkthrough can help.
How to escape the battlefield in Episode 4: Unger
First, go straight ahead and grab all your fallen cargo, then continue going forward in that direction, keeping the battlefield on your left.
No need to engage with anything around you - just keep pressing on. Be wary of the moving tank that appears, otherwise it's just a linear path to the trenches at the end.
You'll encounter a cutscene when you reach your destination.
How to find the mysterious man in Episode 4: Unger
You'll be fighting some soldiers in this section, so make sure you have a Blood Bag equipped (Left on the D-Pad, then select one). This means you'll refill your blood supplies during combat.
You can also find cryptobytes when exploring in the coral structures, as well as new blood bags, as you explore to give you a top up.
This section sees you explore the trenches in search of the mysterious man. Equip a gun and start going through the maze-like structure. Keep going until you find some soldiers, which usually surround the Mysterious Man.
The soldiers can be killed fairly quick, but the Mysterious Man will take a little more damage to down. After that, he'll flee and retreat.
To track the Mysterious Man's next location, follow the red lava-like trail he leaves behind. It'll snake through the trenches, but soon you'll come across more soldiers guarding him.
You can find Grenades and Shotguns - which you can blast at enemies super quickly - which are both very effective ways at taking down foes. If you lose him, find the trail again - or just keep exploring - and he'll turn out.
After three or four attempts at this, you'll down the mysterious man for good - and start a cutscene.
Tomorrow is finally in our hands! Our Death Stranding walkthrough outlines how to play through the main story, including Episode 3 missions, the Small Thermonuclear Device and how to find a way to change Lockne's mind, find a way to cross the tar belt and make a decision, and bring this to an end. As you play, you can find Memory Chip locations, unlock pre-order bonuses and have to learn how to fight BTs and Mules, how Death Stranding multiplayer works, and to help you get around easier, how to get a bike and how to unlock fast travel in Death Stranding.
How to complete Episode 4: Unger
Once you have completed the battlefield section, grab all the dropped cargo around you, get a bike and head north along the road, until you see the giant structure to your left.
Approach from the north to find the entrance to Mama's Lab.
Doing so will then begin Episode 5.