Aegaeon is the first true boss of the game and the giant on whom you are imprisoned at the beginning of the game. You don't directly fight him until Chapter 4, but you do have to do battle with some of his Infected Hands.
INFECTED ARMS
Throughout the beginning chapters, you will do battle with the Infected Arms twice. The first time is a two-part battle, while the second time takes place in one section. In the first battle, the Infected Hand will slam its claws into the ground and drag them across the floor. In the second section, it will sweep from one side to the other, then start stabbing the areas you can hide in.
During the second fight, most of its attacks involve sweeping its claws across from one side to the other. It will also retreat to the pillar in the back and summon Parasites.
AEGAEON
The first phase of the battle takes place on the same platform as before, but it's being held by the infected Aegaeon. This can prove a little challenging, especially on higher difficulties, as you not only have to contend with Aegaeon's claws itself, but also infected humans with swords. Your goal here is to attack either of the two claws with exposed parts until it breaks, which will trigger the second phase.
The second phase takes place on a smaller, stable platform where you will have to fight one of the infected arms again, while also avoiding the attacks of the armored claws. The Arm only has two attacks, which are to either attack with its tusks at close range, or stab the ground three times while moving to the left. You also have to watch out for the claws on the left side, as they will also attack, but as long as you stay to the right, you'll be fine.
When you get the chance, attack the Arm until you see a white bar appear above its head. Grapple it and you'll now be in control of the Arm, so attack it to make it attack Aegaeon. Do this three times to finish the fight.
