How To Use The Fuel Array And Unlock REX In Risk Of Rain 2

The playable survivors in Risk of Rain 2 all have varying unlock conditions, and one of the riskiest ones to get is REX, an unconventional cyborg that uses its own health to power its destructive abilities. Getting this character isn't that complicated, but without any prior knowledge, unlocking REX is going to take a while.

While this robot's high risk, high reward playstyle keeps it from being the best character in Risk of Rain 2, there's no doubt that some players will be able to get a ton of fun out of REX's kit. If you're wondering how to get this character, here's a guide showing you how.

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By Marc Santos

How To Get REX In ROR 2

REX's logbook entry in Risk of Rain 2 — Risk of Rain 2 REX logbook entry

To unlock REX, players need to complete the Power Plant challenge, which is to bring the Fuel Array Equipment item and take it all the way to the broken robot in the Abyssal Depths, one of the possible fourth stages in the game. It's a simple task that brings with it a fair bit of nuance.

How To Get (& Use) The Fuel Array

How to get the Fuel Array in Risk of Rain 2 — Risk of Rain 2 Fuel Array location

The Fuel Array is a free Equipment item located on the back of your Escape Pod. It can only be obtained from Escape Pods; as such, ROR 2 characters like Acrid or False Son who do not start the game in one won't be able to get it, unless they're in a multiplayer game.

Players will have to carry the Fuel Array all the way to the Abyssal Depths and insert it into the broken robot on the upper levels. However, apart from taking up your Equipment slot, the Fuel Array will explode if you fall below 50% health. When attempting to unlock REX in Risk of Rain 2, try to get items that will keep you safe from burst damage, such as Topaz Brooch, Tougher Times, and Safer Spaces. Hopoo Feathers can also save you from taking fall damage.

Where To Find The Broken Robot

REX's location in the Abyssal Depths in Risk of Rain 2 — Risk of Rain 2 REX location

REX itself is a part of the Abyssal Depth's environment. You can find it on the upper rock platforms in the middle of the map. Look for the big flower bulb sticking out of the ground. If you're having trouble finding the robot, try finding an Equipment Barrel and hope that you get a Radar Scanner. If you have ROR 2's Artifact of Command unlocked, you can pick it from the menu that appears.

Risk Of Rain 2 - REX Survivor Overview

REX in the character select screen in Risk of Rain 2 — Risk of Rain 2 REX character select screen

REX is a ranged survivor that unleashes devastating attacks at the cost of its own health. Its kit introduced an extra layer of risk management (on top of the game's existing scaling difficulty mechanic), and it rewards players who can carefully spend and restore their own health bars.

REX Abilities
Passive - Natural Toxins	Some of REX's attacks inflict Weaken, reducing the movement speed and damage of affected enemies.
Primary Skill - DIRECTIVE: Inject	Fire 3 syringes; the last projectile inflicts Weaken and heals REX for 60% of the damage dealt.
Secondary Skill - DIRECTIVE: Drill	Rain down bullets over a target area for a short duration.
Secondary Skill (Alt) - Seed Barrage	Fire a mortar shot. Costs 15% HP.
Utility Skill - DIRECTIVE: Response	Fire a sonic boom that knocks back and Weakens enemies.
Utility Skill (Alt) - Bramble Volley	Fire a sonic boom that damages enemies and heals REX for every target hit. Costs 20% HP.
Special Skill - DIRECTIVE: Harvest	Fire a bolt that damages and debuffs enemies. Affected targets drop fruits that heal for 25% HP.
Special Skill (Alt) - Tangling Growth	Fire a flower that damages and roots enemies. Heals REX for every target hit, but costs 25% HP.

Similar to ROR 2's rendition of Chef, REX can inflict up to two debuffs from his kit alone, making it a prime candidate for the Death Mark item. Healing items are also great for when you can't get your own healing abilities to work.

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