How to Open the Hidden Bunker in Arc Raiders – Puzzle Event Trial Explained

The Arc Raiders Hidden Bunker event represents one of the most challenging puzzle-based activities introduced in the North Line update. This limited-time expedition requires strategic planning and precise execution, offering substantial trial progress rewards for successful completion. Understanding the event’s core mechanics is crucial before attempting this high-stakes mission.

To access the Hidden Bunker Trials, players must specifically select this event when loading into the Spaceport map. The event operates on a rotating schedule, appearing only during specific time windows that change periodically. This time-gated approach encourages players to monitor the event calendar and plan their gaming sessions accordingly.

The event structure follows a sequential pattern: locate and activate four antennas to unlock the bunker entrance, then navigate the interior to hack eight terminals. Each phase presents unique challenges that test different aspects of your raiding capabilities.

Proper preparation significantly increases your chances of successfully completing the Hidden Bunker event. The expedition’s modified ruleset creates unique challenges that demand specialized equipment and tactical approaches.

During Hidden Bunker expeditions, the number of Return Points is substantially reduced compared to standard Spaceport operations. This limitation makes resource conservation paramount – we strongly recommend equipping superior healing items and focusing exclusively on primary objectives. The reduced safety net means every decision carries greater weight.

Another critical consideration: the Spaceport Hidden Bunker map contains no Raider Hatches. This design choice forces players to adopt evasion-focused strategies rather than engaging in prolonged combat. ARC enemies will continuously spawn throughout the event, making avoidance the optimal approach in most situations.

Strategic gadget selection proves invaluable for navigating the challenging terrain. Ziplines and other mobility utilities enable rapid traversal across the expansive map, helping you reach antenna locations and complete tasks efficiently. Consider bringing equipment that enhances vertical mobility, as some antenna placements may require creative approaches.

Unlocking the Hidden Bunker requires locating and activating four distinct antennas scattered throughout the Spaceport map. These critical objectives are marked by distinctive white satellite symbols that appear on your HUD when within detection range. The antenna locations follow a procedural generation system, meaning their positions can vary between event instances.

This visual reference demonstrates the typical antenna distribution pattern across the Spaceport terrain:

Activation requires close proximity to each antenna followed by holding the E button to establish connection. The process takes approximately 3-5 seconds, during which you’re vulnerable to enemy attacks.

Successfully activating an antenna triggers an immediate response from ARC forces. Expect significant enemy swarming within 15-20 seconds of completion. You have two primary response options: engage in defensive combat or employ stealth tactics to evade detection until the initial alert phase subsides.

Once all four antennas are activated, the Hidden Bunker entrance becomes accessible. The bunker’s precise location sits strategically positioned between the Fuel Lines and Fuel Processing areas, creating a natural choke point that requires careful approach.

Inside the bunker, your primary objective shifts to locating and hacking eight separate terminals. These computer stations are distributed throughout the interior spaces, requiring thorough exploration of multiple rooms and corridors.

The terminal hacking process follows similar mechanics to antenna activation: approach each terminal and interact using the E button. Each successful hack contributes to your overall event completion percentage, with all eight required to finish the trial.

Strategic terminal sequencing can optimize your completion time. While terminals can be hacked in any order, planning an efficient route through the bunker layout minimizes backtracking and exposure to patrolling ARC units. Consider tackling terminals in a circular pattern that flows naturally with the bunker’s architectural design.

Upon hacking the final terminal, you’ll receive immediate notification of event completion and corresponding trial progress rewards. Exit the bunker promptly to conclude the expedition successfully.

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