The "What We Left Behind" quest in ARC Raiders is one of those missions that makes you run around to three different maps just to find some lost items. It's given to you by Tian Wen, and while it sounds like a lot of work, it's actually pretty chill since you don't even need to extract with the items for them to count. You just gotta interact with specific spots in the Buried City, Dam Battlegrounds, and Spaceport. In this guide, we will show you exactly where to look so you aren't wandering around aimlessly.
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Here is the quick breakdown of the mission:
Quest Name: What We Left Behind
Quest Giver: Tian Wen
Objectives:
Search 2 containers in the Raider Camp (Buried City)
Search the South Swamp Outpost (Dam Battlegrounds)
Search Bilguun’s Hideout (Spaceport)
Maps: Buried City, Dam Battlegrounds, Spaceport
Rewards: 1x Muzzle Brake II, 1x Vertical Grip II, 1x Stable Stock II
You can do these objectives in any order, so just pick whatever map you feel like playing first.
Load into Buried City and head towards the Parking Garage. It's located near the middle of the map, pretty close to the Hospital and Marano Park. Be careful because this area is usually hot with ARC enemies. [PICTURE PLACEHOLDER]
Once you are there, look for the elevator shaft. You can breach the door and take the zipline all the way down to the bottom floor. Down there, you will find a hidden Raider Camp. You just need to find and search 2 containers (usually duffel bags or boxes). It doesn't matter which ones you pick, just loot two of them and you are done with this part.
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Next up is the Dam Battlegrounds. You need to go to the South Swamp Outpost. Head to the swamp area on the west side of the map. Look for a structure hidden in the forest south of the swamp waters. It looks kind of like a silo or a big bunker building. \
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Go inside the biggest building in the outpost. Look for a red cabinet. Right next to it on a small table, there are some files you can interact with. Grab them to finish this objective.
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The last one is in the Spaceport at Bilguun’s Hideout. This is probably the hardest one to find if you don't know where to look. Go to the Container Storage area. On the southeast side (to the right of the main storage building), look for a massive concrete wall. There is a lonely container sitting high up on the wall with a long ladder leading up to it. Climb the ladder to get inside the hideout. Inside, look for some notes on the floor to the left. Interact with them and you are all done!
Completing "What We Left Behind" will give you some nice weapon attachments to upgrade your guns: