Gemini is one of the main quests in Horizon Forbidden West. Read on to see the detailed walkthrough, rewards, location, and tips for the Gemini quest!

Gemini Overview and Location

Basic Information

Cauldron Gemini Location

Note: Cauldron Gemini is part of a Main Quest and is not available before clearing the Faro's Tomb Main Quest.

Gemini Walkthrough

Objectives
1	・Return to the Base ・Talk to GAIA ・Talk to Varl ・Talk to GAIA Once you agree to go to Gemini, you'll be thrown directly into the Cauldron in the middle of a battle, so be sure to make all preparations beforehand.
2	・Protect Beta Defeat the machines and the Behemoth. All the machines here are weak to Acid, so keep them loaded up with Acid Arrows. If you have an Elite Blast Trap, you can use it take the Behemoth out fast.
3	・Pursure HEPHAESTUS Into the Cauldron In the next room, use the Shieldwing from the ledge to glide down to the platform ahead and below. Use the Pullcaster on the blue disc to pull out a pipe that you can climb up. Shieldwing down, and go left, then grapple up to the ledge on the left. Pullcaster out another pipe and climb up. From the ledge, hitch a ride on one of the machines that flies by. You can also just boost your way up using the Pullcaster and grab on the transporting machine.
4	・Force HEPHAESTUS Back to the Core In the next room, you will have to fight a huge number of machines at once. You will not be able to perform the override until the machines are cleared. If you stay on the ground, you'll be swarmed. There is a platform on the opposite wall of the one you entered the room on that you can grapple up to. From here, you can camp all of the machines and simply dodge their long-range attacks to easily clear the room.
5	・Return to the Assembly Chamber Platform across the room and grapple up to the high ledge directly ahead. When you attempt to use the override, you'll have to fight another big wave of machines. Hide in the vents in the middle of the room to lose the machines' attention. From here, you can move out into the steam vents to catch machines by surprise.
6	・Kill the Slaughterspine ・Override the Network Uplink ・Return to Beta and Varl You'll fight a Slaughterspine. After defeating it, return to Varl and Beta to complete the Quest. While it's charging its Plasma attacks, place an Advanced Purgewater Trap in its line of motion to inflict it with the Drenched status and prevent its attacks from having a Plasma elemental effect.

▸Next Quest: All That Remains

Tips and Strategies

Prepare All Weapons and Supplies You Need

You'll be relentlessly faced with machine battles each step of the way for this Quest. Although there are plenty of healing supplies available throughout, make sure your valuable inventory space and Potions Pouch are not filled up with ones you won't need. Consider upgrading your Potions Pouch before Quest to make things easier on yourself.

Use the Terrain to Your Advantage

Some enemies can lose sight of you if you hide behind walls or go up the ledges. It will allow you to prepare your ammo, potions, traps, and other things before heading back to the fight again. It will also allow you to sneak behind them and then attack them using Silent Strike once they are unaware.

Apply Berserk Status Effect

Since there will be a lot of machines in here, it is a good idea that you use weapons that can put enemies into Berserk State. Enemies affected by it will attack anything on sight, regardless of whether they're allies or foes. It will also allow you to attack them without risking getting shot back.

Boss Strategy Guide

Slaughterspine

How to Beat Slaughterspine - Key Points

• Shoot Purgewater projectile on the Purgewater Canisters.
• Detach the Spinetail Launcher and use it against Slaughterspine.
• Destroy the Metalbite Sacs on Slaughterspine arms.
• Put it to Brittle State using Frost ammo and traps.

How to Beat Slaughterspine: Boss Fight Guide

Horizon Forbidden West Quests

List of All Quests

List of All Quest Types

List of All Main Quests