Outriders: Chem Plant Expedition Guide

Outriders’ endgame revolves around Expeditions, time-sensitive dungeons that grant better rewards as you clear the mission faster. Builds that output a lot of damage are preferred for every Expedition, but some Expeditions are far easier than others.

Even after a timer nerf, Chem Plant is one of the easiest Expeditions in the game. Nearly every build can obtain at least a Silver rating in this mission, and most DPS builds can achieve Gold with a few tries. If you’re looking to unlock Challenge Tiers or farm Legendaries, this is a great Expedition to farm. Here’s a guide on how to quickly clear the Chem Plant Expedition in Outriders.

Completion Times And Enemies

Completion Times

  • Gold: 10:50
  • Silver: 19:10
  • Bronze: 25:00


Most of this level consists of Insurgents (bandit enemies), although the last arena is mostly against Warzone Beasts. Many of this level’s enemies are heavily armored, so consider bringing Anomaly damage or Armor Piercing mods to take down these enemies quickly. Enemies pack quite a punch once you reach the interior sections of Chem Plant, so bringing some mods that enhance your Armor is highly recommended.

First Room

Right as the Expedition begins, head up the set of stairs to your left to take out the Marksman sniper. From there, eliminate the fodder enemies as you make your way to the gate. They shouldn’t pose much of a threat.

Juggernaut Captain

When you get near the gate, a second wave of enemies will begin to spawn. To the right of the gate will be a lone Juggernaut Captain that can inflict Freeze and has an absurdly large health bar. Take this enemy out immediately, using all of your abilities to nuke his health bar. If it does end up Freezing you, melee! Your melee ability breaks you out of crowd control effects.

Past the Juggernaut will be a handful of fodder enemies, including Breachers and Rifleman. Carve a path through them, then interact with the switch at the end of the path to enter the chemical plant.

Chem Plant Interior

Right as you enter the chem plant, head left to take out a small group of Insurgents. The Captain is your top priority here. When those enemies are dead, you’ll have a group of Breachers and Ironclads charge up the stairs next to you. Either stick to cover or push them. There will be a few stragglers directly across from you. Take them out to spawn the next wave of enemies.

Second Wave

A massive wave of enemies will spawn together directly across from where you came from, consisting of a few Captains and a Juggernaut Captain. Try not to get hit by a melee unit when fighting these guys, as this can easily lead to getting stunlocked. Kill the Juggernaut as fast as you can to prevent getting Frozen. Once all of the enemies are defeated, run down the nearby stairs to reach the next combat arena.

Chem Plant Second Floor

This room is the hardest part of Chem Plant. Right as you enter this room, you’ll want to either enter the room to your right or rush the Juggernaut Captain in front of you. Once again, these Juggernaut Captains can inflict Frozen on you, resulting in certain death at high Challenge Tiers. Focus on defeating the Juggernaut Captains when it’s safe.

Most enemies will congregate to the right side of the arena, so you should stay there if you want to complete Chem Plant quickly. Killing most of the enemies will cause enemies to spawn at the left side of the room. Take them out, then interact with the elevator at the end of the room.

Second Wave (And Encounter Skip)

Two waves will spawn simultaneously, one directly across from you and another to your right. To progress, you’re supposed to kill both waves. However, you can skip half of this encounter.

You only need to kill one wave of enemies to open the elevator door. Kill the wave directly across from you, as the other wave is made up almost entirely of Elites. When that wave is dealt with, you’ll hear an audio queue after a few seconds. That queue tells you that the elevator doors have opened, allowing you to escape. Run to the elevator to reach the boss arena. If you don’t want to skip this part, simply kill the second wave before leaving.


Dispatch the small group of Insurgents guarding the reactor, then interact with the reactor’s terminal to start the final encounter. Warzone Beasts will make up most of the enemy roster down here, so have a few crowd control effects at the ready. Enemy waves will spawn from different directions in the arena. You can either rush the enemies or stay at a distance. Use whichever strategy your build prefers.

Defeating a few Beasts will cause some Insurgent waves to spawn. Once they’re taken care of, the final boss will spawn alongside quite a few Warzone Beasts. Your cooldowns will reset when the boss spawns, so feel free to use your abilities before that point.

Brood Mother Boss

Chem Plant’s final boss is a Brood Mother with a massive health pool, guarded by multiple Warzone Beasts. Your cooldowns are reset when it spawns, so give the Brood Mother everything you have. You’ll need to kill every enemy to complete the Expedition, so focus on the Brood Mother first before it starts to buff the other enemies. Besides the boss, multiple Perforos and Venemous variants will rush you. These enemies won’t pose much of an issue. Kill all of the enemies to end the Expedition and receive your loot.

Next: Outriders Complete Guide And Walkthrough

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Charles Burgar is an expert on all things tech and gaming. Graduating from Pikes Peak Community College in 2018 with an Associate of Science, Charles has spent his time dissecting popular video games, movies, and technology. With an understanding of games for as long as he can remember, Charles has a large interest in understanding what makes things fun. He is currently a Freelance writer for TheGamer and Game Rant.

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