The Dam Testing Annex Key is one of the many random keys you can find while looting in ARC Raiders.
As the name says, this one opens a room at the Testing Annex in the Dam Battlegrounds. Can’t enter that room at all without the key, so the loot within is safe and sound from most players! It’s just waiting for someone to take it…
Want to be the one to open up that loot cache? Read on, we’ll tell you how to get and use this key.
Dam Testing Annex Key Use Location

The Dam Testing Annex Key, like most other keys in the game, is a random drop. That means that you can find it at complete random when looting pretty much any container. There’s no set spawn point for it!
Also, while the key is tied to the Dam Battlegrounds map, it’s also likely that it can spawn even in other maps.

If you did find that key, you’ll need to head to the Testing Annex in the Dam Battlegrounds, as we’ve mentioned before. Said building is in the southeastern corner of the map. We’ve marked it for you on the screenshot above.
At the Testing Annex, go in through the main entrance. Then, as shown on the clip above, just go straight ahead until you eventually reach a large steel door with a panel next to it. Interact with that panel to use the Dam Testing Annex Key and open the door!
Do keep in mind that the key will be spent on use, so you will lose it. If you want to re-enter this room on another match, you’ll need to get lucky enough to find another key randomly.
Either way, that’s the location and use of the Dam Te Annex Key in ARC Raiders. All that’s left for you to do is to grab all the loot before other players try to take it! Hopefully you’ll get something that’s worth the effort…
Now, do you want to know a spot that does guarantee amazing loot and doesn’t even need a key? Check out our guide on the Dam Control Tower bypass. The only issue with that bypass is that it’s a hotspot, so a lot of other players will also be there!

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