Locate the Filtration System in Arc Raiders during The Clean Dream quest.
Completing the Clean Dreamquest in Arc Raiders can be a bit of a challenge, especially if you’re not familiar with locating the underground tunnels at Spaceport and haven’t tackled the Switching the Supply quest that leads you there. Beyond just finding the tunnels, you’ll also need to locate the Filtration System down below.
Once you’ve accomplished that, your next destination is Blue Gate, where you’ll search for a Purification System in a bunker. This quest is quite lengthy, requiring two separate runs. I’ll guide you through each step to help you finish it. If you want to avoid risking your gear, this quest is perfect for a free loadout since you won’t need to extract anything valuable.
The first step is pretty simple if you remember where the underground tunnel is from the Switching the Supply quest. This underground area of the Spaceport map runs around the Launch Towers, and you can access it from several points, including the main entrance I’ve marked on the map.
While you’re down there, you need to search four containers. Most of these are typically found on the raised walkway to the side, where you can breach and check electronic boxes, or in the small control rooms scattered along that walkway. After that, you’ll need to locate the Filtration System.
This part is amusing because it rewards you for recalling the location of the water supply valve from the Switching the Supply quest; the Filtration System is just to the right of it. Head to the marked location and interact with the green water tank.
If you entered the tunnels through the entrance I indicated, it’s literally right next to that—you just need to backtrack a bit after entering the tunnels via the concrete slope and then look to your right. Once you’ve done that, you can exfiltrate, as the next step takes place at Blue Gate.
The Maintenance Bunker is situated towards the center of Blue Gate, southeast of Checkpoint, right by the Overlook Airshaft exfil. Be cautious, as there’s often a Rocketeer patrolling this area. Go inside, and you’ll receive the objective to “Monitor the Purification System in the bunker.”
For me, this was the leftmost of the two large cylinders in the main room, although the right one might work too—since the bunker is quite compact, they’re hard to miss. Drop down to the lower floor and interact with them to complete that step.
From the Purification System, head back up the stairs onto the walkway, turn left, and retrace your steps down the walkway. Then, turn right into the room with the desks—you’ll find a stack of folders on a desk to your left that you can interact with and photograph, finishing the quest. Again, the bunker is very small, so this is quite hard to overlook.
