ARC Raiders has plenty of spots that can only be opened with the correct key, and the Cellar in Blue Gate can be extremely rewarding if you manage to get in.
As with several other locations in Blue Gate, you'll need to find the key first. All keys, barring those associated with quests, are found at random, but you'll still have to look in all the right spots. This guide will help you find the key that unlocks the Blue Gate Cellar and where you can use the key.
