Best Once Human Acid Farm

In Once Human, Acid is an important resource as it is used in a lot of crafting recipes and one of the more predominant materials involved in crafting specialty Ammunition that can deal with end-game bosses. We’ve put together the best Once Human Acid Farms so you can get as much of it as you may need for crafting.

Best Passive Once Human Acid farm

The best Once Human Acid farm involves setting up a passive farm at your base that will automatically generate Acid for you to use. Primarily using Water Pumps, this passive farm can generate 288 Acid per day for a mere 108 Watts of power.

It’s important to note that Acid can only be created in polluted areas, so make sure you are in one when setting up the passive Acid farm. If you see a number fluctuating on your character’s back, you are in a polluted area. Here’s what you’re going to need to build this passive Acid farm in Once Human:

• 10 Water Pumps
• 1 Osmosis Water Purifier
• 1 Fermentation Barrel
• 108 Watts of Power
• Built in Pollution Zone

Build some Advanced Hydraulic Generators to create power for your base, and then construct your 10 Water Pumps. Make sure you raise the elevation using the scroll wheel when placing the Water Pumps so you’re not pumping groundwater but rather polluted water which is why you are in the Pollution Zone. Each Water Pump you build requires the following materials:

• 25 Steel Ingot
• 20 Carbon Fiber Fabric
• 20 Refined Parts
• 20 Standard Parts
• 20 Electronic Accessory
• 10 Watts of Power

Make sure all the Water Pumps are dumping into Water Storage Containers. From here, connect the other side of the Water Containers to an Osmosis Water Purifier. The Osmosis Water Purifier will convert the Polluted Water into Impure Acid.

You’ll have to manually collect the Impure Acid out of the Water Purifier, which you then place into a Brewing Barrel. A completely filled Brewing Barrel will generate 4 Acid every 20 minutes, making this passive base the best Once Human Acid farm!

The best active Acid farm in Once Human

Using this method, you could collect upwards of 1,000 Acid per hour, but it is a bit of a grind. This method involves using one of the game’s many refineries. The first thing to do if you’re going to grind refineries is to make Deviated Chops, which helps boost the Acid drop rate.

You can craft Preserved Deviated Chops at an Electric Stove or Kitchen Set, and you’ll need one of any meat, one peppercorn, and two salt.

Now you’ll want to find a refinery. My favorite one is at the Blackfell Oil Fields, which can be found by looking for the refinery icon, as depicted below.

Walk up to the production facilities, interact, choose the card you want, and start the defense. Be warned, however, that the level 45 monsters can be quite challenging.

If you don’t have a strong build, be sure to enter build mode and block all the entrances before you rush the start of the defense.

In just one run, I managed to get over 200 Acid, and an average run takes about 7 minutes in total to complete. This means that you can easily get more than 1,000 Acid per hour, or even per half-hour if you’re lucky — all while your passive Acid farm is generating even more back at home.

Keep in mind that the majority of your Acid comes from the mobs you defeat, so be sure to pick up all the loot as you go.