Marathon has a lot going on while you’re running all over Tau Ceti IV, from avoiding getting killed by UESC to hunting down other runners for their hard-earned loot. While playing, you’ve probably come across several things you haven’t seen before.
One of these things, like Access Clearance Codes, are a fairly abundant resource on Outpost that you may be wondering what exactly they do. Their description isn’t particularly helpful, and in this extraction shooter, you won’t want to risk it for the biscuit.
That being said, this guide will run you through getting Access Clearance Codes and what you can use them for. They can be pretty helpful, especially if you’re playing as a Rook and looking to score some good loot when everyone is mostly gone.
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Where to Find Access Clearance Codes?
Finding the codes is a bit of luck mixed with knowledge. There seems to be a number of them that spawn randomly around the Outpost map and rarely in containers, but for the most part, you can find them in Flight Control.
You won’t find many spawning in containers, but rather they’ll be sitting on surfaces, though it is entirely possible to find them in containers randomly. If you’re having trouble finding them, it could mean that a bunch have been picked up, so you’ll need to find other Runner bags or turn Runners into bags yourself.
Where to Use Access Clearance Codes?
Around the Outpost map, you’ll find several terminals that have an orange/yellow symbol on them. Many of these open locked doors or pathways that you otherwise wouldn’t be able to access.
To open them, you’ll need to have enough access codes to turn all the symbols on these terminals green. In some cases, you may need as many as three to actually get any of the terminals opened up.
When you activate a terminal, you’ll use up your access codes in your inventory.
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Gaining Access to Pinwheel
The best use of Access Codes is to get into the Pinwheel on Outpost. There are three entrances, all of which need between two and three Access Codes to be opened.
If you manage to find one of the entrances, but don’t have enough Access Codes, you can always look around the vicinity to see if there are any left over. You can usually find at least a couple.
When you unlock the Pinwheel terminal, you’ll immediately force the spawn of four or more enemies just inside the door.
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Opening Locked Doors
Another great use for them is unlocking locked doors that contain a good chunk of loot. They usually only need one or two Access Codes, so they’re a bit easier to get open, but have a few boxes, medical storage, and usually a weapons storage or two.
That makes it a great way to stack up on loot if you’re feeling a little low or running low on time. If you’re struggling to Exfil with the loot, you may want to tackle some of the easier areas and get more from things like lockboxes.
Summoning Supply Drops
Unlike on Perimeter and Dire Marsh, supply drops on Outpost can’t just be summoned with the push of a button. You’ll need to bring your Access Codes to actually activate them.
You’ll also need to grab one Supply Clearance Code, which you can only find from the boxes with the glowing O-shaped symbol on them scattered around the map.
These boxes are typically inside closed rooms, but it seems like they have a chance to spawn anywhere inside.
You’ll need at least one Access Code and one Supply Code if you’re hoping to call the supply drop. Otherwise, you’ll just be helping the next person who comes along with one of the codes you don’t have.
Remember, this is an extraction shooter, so even if you manage to collect some good loot, it won’t matter much if you can’t Exfil. Even if you don’t manage to extract, you’ll at least have the knowledge of everything you didn’t have before.
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- Released
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March 5, 2026
- ESRB
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Teen / Animated Blood, Language, Violence, In-Game Purchases, Users Interact
