On this page of our guide to Death Stranding, we have described the first encounter with Clifford Unger that takes place in Chapter 4 of the game. This confrontation can be classified as a boss fight. The meeting takes place on the battlefield of the Ist World War.
The initial part of Chapter 4 has a very linear course. You must ultimately reach the place where a cut-scene will be displayed that shows Clifford Unger (the game still uses the name of Combat Veteran and the Mysterious Man). Only at this point the hunt for Unger will begin.
Before you even start attacking the boss, use a scanner to collect as much supplies from the area as possible. Get interested in blood bags, firearms and grenades. In this chapter, you may exceptionally use lethal weapons. You can select any of them (for example, an assault rifle) to attack the boss.
You have to move through the trenches and look for Unger. An antenna will help you locate him - it always turns (indicates) to the place where the boss and his vanguards are currently staying.
Once you have found your enemies, always focus on identifying and attacking Unger - by weakening him enough you will push away the whole group.
After you have weakened Unger sufficiently, he will move to another place on the map. Then, the whole cat and mouse chase will restart. You have to defeat him four times in total. This will activate a new cut-scene. After that, Chapter 4 will end.