How to Purify your Territory in Once Human

Base purification guide (Image via Starry Studio)
Base purification guide (Image via Starry Studio)

Territory Purification in Once Human is one of the main gameplay objectives you will need to tackle. Successfully purifying your base will reward you with Starchroms, one of the currencies you will need to operate the Wish Machine and buy various blueprints in Once Human.

Territory purification in Once Human is not too hard if you plan accordingly. There are multiple levels of difficulty when it comes to purifications. If it's your first time going through the process, make sure you start with a Level 1 purification because anything higher than that will be overwhelming.


Guide for Territory Purification in Once Human

Build the Stardust Resonant Filter first (Image via Starry Studio)
Build the Stardust Resonant Filter first (Image via Starry Studio)

To start purification, follow these steps:

  • First, collect the following items: 30 Metal Scraps, 20 Glass, 20 Rubber, 10 Copper Ingots, and 10 Acid.
  • Construct the Stardust Resonant Filter using the materials. Do this by navigating to Facilities and then Function Facility in the Build menu. Locate the Stardust Resonant Filter and place it within your territory.
  • Position it as far from the territory center as possible and fortify it as much as you can. The best strategy is to place it on an elevated platform and surround it with sandbags to secure it from melee attacks. Also, place turrets and traps to ensure no monsters get too close to them.
  • Acquire an Eclipse Cortex Stone. These rare purple stones are crucial for the purification process. Obtain them by completing dungeons and participating in events. Remember, they come in three levels, each affecting the difficulty of purification.
  • Approach the Stardust Resonant Filter and press "F" to activate it. Insert at least one Eclipse Cortex Stone to prepare for purification. This screen will tell you how much Starchrom you will get once the purification is finished.
  • Look for the "Start Purify" button in the lower right corner of the filter's menu. Click it to begin the enemy waves.
  • As soon as purification starts, a timer will appear. Prepare to fight waves of enemies attempting to disrupt the process. Your mission is to protect the filter until the countdown ends.
  • Upon successful defense and timer completion, you'll have purified your base. Collect your well-earned Starchroms and the rewards for any mission requiring you to finish purifying your base.

Also Read: Once Human weapons tier list


Base Purification Difficulty Based on Eclipse Cortex Stone Level

Place the Cotex Stone to start the fight (Image via Starry Studio)
Place the Cotex Stone to start the fight (Image via Starry Studio)

Eclipse Cortex Stone Level 1:

  • Monsters Level: 15
  • Enemy Waves: 3
  • Elite Enemies: 2

Eclipse Cortex Stone Level 2:

  • Monsters Level: 25
  • Enemy Waves: 3
  • Elite Enemies: 2

Eclipse Cortex Stone Level 3:

  • Monsters Level: 35
  • Enemy Waves: 2
  • Elite Enemies: 1

Read More: All active Once Human Redeem Codes


That's all for the Base Purification in Once Human. We hope this guide will help ease your grind.

Check out our other guides on this game:

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Edited by Angad Sharma
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