This is the final boss fight so let’s get started. Approach the fury sisters and destroy the barrier with the Eye. Wait until you get thrown into a boat. Take out the normal enemies while evading Tisiphone’s aerial barrage and charging attacks. The lesser minions won’t be attacking aggressively so you just have to keep your eyes peeled and evade when their spears turn red. Keep dealing damage to Tisiphone until she releases green orbs. Keep dealing damage to her to end the first phase of the battle.
Once Alecto’s grabs hold of your boat using her tentacle, attack it until it is covered by a illusionary armor. Destroy that armor using the Eye and keep attacking that tentacle. One of the tentacles can spew sticky ink so use Orkos’ Oathstone (L2 + triangle) to escape. Keep dealing damage to that tentacle until you see a prompt to grapple it.
Alecto will still grab hold of the boat. This time, you have to remove the protective skin on the tentacle and attack it while avoiding the other tentacles’ attacks. Once enough damage is dealt, you’ll get a prompt to grapple it. Do so to trigger a QTE. Press the buttons correctly and you’ll finally be prompted to impale and cut one of the tentacles. You’ll be submerged in the sea where you have to do another QTE. Once you’ve grab hold unto Alecto’s head, keep hitting the square button to finish this sequence.
Once you’re in the platform, pick up the spear nearby and keep throwing spears at Alecto. Be careful when two of its tentacles is covered with ice-like coating. When it hits the ground, it will create shockwave. Double-jump to avoid getting damaged. When Alecto rushes in for a bite, evade to the left and attack her until your chains can’t reach her. Her tentacles can still spew ink which you can easily evade. A spear will occasionally re-appear so pick it up so you can easily deal ranged damage.
Tisiphone will join the battle. Her attacks are still the same so deal as much damage to her as possible until Alecto joins the battle. It will be a challenge evading all their attacks so don’t hesitate to use magic to negate possible damage that will be dealt to you. Keep attacking Tisiphone first until she leaves the area. You can now concentrate on dealing damage to Alecto. Once she’s critically wounded, a red grappling prompt will appear over her head. Grapple her and properly press the QTE buttons. Finally, impale the gaping wound to end the battle.
The weakened sisters will be at your mercy now. Just approach them and follow the prompts to kill them and end the game.
Dealing the finishing blow