Sons of the Forest has several secret underground facilities for you to discover. To reach them, however, you're going to need an important item. Here's our guide to help you get the Maintenance Keycard in Sons of the Forest. With it, you'll unlock other facilities on the island.
You might be thinking of grabbing the Sons of the Forest Maintenance Keycard in a short span of time. Unfortunately, you can't do that right from the get-go. Apart from deadly cannibals and mutants, you still need to acquire important tools.
We've listed these items below. Bring up your GPS Tracker by pressing the «M» key. Regardless of how the map rotates depending on your character's orientation, let's just pretend that the mountains are to the north.
Now that you have the Shovel, it's time to look for the Sons of the Forest Maintenance Keycard. Remember the cave that had the Shovel? Well, all you need to do is head to the green marker that's west of that (assuming the mountains are to the north when you're looking at your map).
When you get there, you'll see a blue golf cart, as well as a patch of soil that can be unearthed. Dig with the Shovel, open the hatch, and climb down the ladder. Inside, you'll see a small office room to your right. You can pick up several items here:
In any case, the Sons of the Forest Maintenance Keycard will allow you to unlock doors in other facilities, where you might find goodies like weapons and attachments. As for the next step of your journey, you'll have to look for the VIP Keycard, followed by the Guest Keycard.
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