The Blue Gate Cellar Key is one of several random keys you can find while exploring ARC Raiders. It’s easy to overlook, but it leads to a few hidden basements packed with loot and occasional quest items. Here’s where to find it, and what to do once you’ve got it.
Where to Find the Blue Gate Cellar Key

The key can drop at the Ruby Residence on the Dam Battlegrounds map. From experience, it appears to be a random drop, similar to other residential keys scattered across the world.

When searching, make sure to check drawers, cabinets, and shelves inside homes and residential buildings. The Research & Administrator’s Building is also a reliable farming spot, especially on the second floor, where cabinets and storage units often spawn random keys.
Just keep looting every possible container you see in these areas; key drops are luck-based, but the more you check, the better your odds.
How to Use the Blue Gate Cellar Key
Once you’ve got the key, travel to the Blue Gate map. There are multiple cellar basement locations, I’ve personally confirmed one, but there seem to be two or three across the area.
If you come across another locked cellar door marked for the Blue Gate Key, make sure to note its coordinates (or drop it in the comments if you’re sharing with others). The community’s been piecing these together as they appear.
What You’ll Find Inside
After unlocking a cellar, climb down the ladder and start looting. The basements usually contain a good amount of supplies, though don’t expect military-grade loot. Most of what you’ll find here is residential gear, consumables, and crafting materials, but sometimes you’ll stumble on quest-related items too.
It’s a small reward loop, but still worth the effort if you’re already in the area or farming keys.
Wrap-Up
The Blue Gate Cellar Key might not lead to high-tier gear, but it’s a solid find for scavengers who enjoy clearing out hidden locations and picking up side loot along the way. It’s another reminder that in ARC Raiders, exploration always pays off, even when it’s just a locked door under a house.
Up next, check out my guide on how to complete the Medical Merchandise quest if you still haven’t completed it yet. One of the locations include the Research & Administrator’s building which is mentioned in this guide too!

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