When playing Arc Raiders, many players encounter the Ancient Fort Security Code for the first time during missions with the Locked Gate modifier. For newer players—or even those with some experience—it can be confusing how these codes work, why they matter, and how to use them efficiently. In this guide, I’ll break down the key questions that most players have, based on how people usually approach these challenges in practice.
What is the Ancient Fort Security Code?
In general, the Ancient Fort Security Code is a temporary item that functions like a key. Its main purpose is to unlock the main gate in missions that include the Locked Gate map modifier. It is considered a common key item, meaning that it isn’t rare, but it is essential for progressing through certain areas.
Most players will notice the following about the code:
Weight: 0.25, which is very light and does not significantly impact your carry capacity.
Stack Size: 1. You cannot carry multiples of this code in the same inventory slot.
Sell Price: 0. The item cannot be sold to vendors in the base game, though in some communities, players might trade similar items informally.
The code is usually found inside mission areas or given as a reward for completing specific objectives. Its temporary nature means it will disappear once the gate it unlocks is used or the mission ends.
How Does the Locked Gate Modifier Work?
In missions with the Locked Gate modifier, the main gate is inaccessible until players collect the necessary security codes. Typically, there are four codes required to open the gate, and the Ancient Fort Security Code is one of them. In practice, this means:
Teams usually split up or explore the map carefully to find each code.
Most players share codes among teammates to speed up progress, especially in higher difficulty missions.
If a code is missed, the team usually has to backtrack, which can be risky because enemy encounters respawn in some maps.
From experience, using a coordinated approach is more efficient than rushing. Players who try to grab codes individually often spend more time respawning or dealing with extra enemies.
Where Can You Find the Ancient Fort Security Code?
The location of the code depends on the mission, but there are some patterns most players notice:
Usually near minor objectives or secondary areas that are easy to overlook.
Often guarded by standard enemies rather than elite foes, making it accessible even for mid-level squads.
Some players report that exploration perks or mobility skills make finding the code faster, as you can reach hidden rooms or higher platforms more easily.
In general, if you know the Locked Gate modifier is active, it’s a good idea to systematically check all corners of the map before engaging high-priority enemy objectives.
How to Use the Ancient Fort Security Code Effectively
Once you have the code, using it is straightforward:
Approach the main gate.
Open your inventory or key menu.
Select the code and apply it to the gate.
Most players will try to do this as soon as they have all four codes. Using them in sequence is important because skipping a code usually prevents the gate from opening, and the game may require you to re-collect missing codes.
Should You Keep or Sell the Code?
In the base game, the Ancient Fort Security Code has no sell value. That said, some players explore secondary markets in fan communities and forums to trade items for in-game currency. For example, it’s possible to sell ARC Raiders blueprints on U4N for cash, which can fund better equipment or cosmetics, but the security code itself usually isn’t tradable in most organized markets.
In practice, most players simply use the code immediately to progress and do not attempt to hold onto it. Trying to hoard the code rarely provides a gameplay advantage and may slow down mission progress.
Common Mistakes Players Make with Security Codes
From watching and playing with others, several patterns emerge:
Forgetting a code: Players sometimes open secondary objectives too quickly and miss the location of one code, which forces a time-consuming backtrack.
Using codes in the wrong order: The game usually checks that all codes are present before opening the gate. Using a single code too early will not unlock the gate.
Not communicating in co-op: In teams, failing to share who found which code often leads to duplicate searching and wasted time.
Most experienced squads will assign one person to carry the code and another to scout the area. This approach reduces mistakes and keeps everyone focused.
How the Security Code Fits Into Overall Strategy
In general, codes like the Ancient Fort Security Code are a small but meaningful part of mission design. They add a layer of strategy beyond simply defeating enemies. Most players find that understanding how and when to use them improves efficiency:
Helps coordinate team movement.
Prevents backtracking under fire.
Gives a clear milestone in missions, letting players measure progress toward unlocking high-value objectives.
In short, treating security codes as tools for mission management rather than rare treasures usually leads to smoother gameplay.
Key Takeaways
The Ancient Fort Security Code is a common, temporary key required for the Locked Gate modifier.
You usually need four codes to open the main gate.
Explore systematically, share codes in co-op, and use them immediately.
The item cannot be sold in-game, though other community-traded items, like ARC Raiders blueprints, can be exchanged for cash.
Avoid rushing or hoarding; the code’s main value is functional within missions.
Following these practical tips helps most players move through Locked Gate missions more efficiently and avoids the common mistakes that slow down progress.
