Silo EX1: The Ultimate Path to Power for Once Human's Mask Mods
In the unforgiving world of Once Human, power isn't just an advantage; it's the difference between survival and becoming another statistic in the twisted landscape of Nalcott. For players seeking to forge the most devastating builds, particularly those centered around the raw offensive power of a Burn build, a critical component lies hidden within the depths of a specific facility: Mask mods. While random chests offer only fleeting hope and the Prime Wars demand coordinated legions, there exists a targeted path to power. That path leads directly to Silo EX1, the premier destination for farming these game-changing enhancements. But what secrets does this Rosetta facility hold, and how does one conquer its peculiar and perilous challenges? 🎮

Located in the rugged terrain of the Chalk Peak region in Eastern Nalcott, Silo EX1 stands as a silent sentinel south of the ominous Monolith of Thirst. The journey typically begins at the southernmost Teleport Tower, near the coastline, requiring a swift vehicle ride to the silo's cliffside entrance—a trek that underscores the importance of this dungeon for dedicated operatives. Once inside, players descend into a sprawling underground complex, a former Rosetta facility dedicated to Deviant experimentation. The atmosphere is thick with the remnants of forbidden science, moving from sterile laboratory floors to grim holding cells and testing chambers. Unlike some of its counterparts, Silo EX1 lacks a Seepage Zone, but it more than compensates with a linear, corridor-like layout filled with strategic secrets and lethal mechanics.
The initial descent via elevator deposits players into a chaotic laboratory swarming with enemies. Clearing this area is the first order of business, culminating in the defeat of a large Deviant that drops a crucial keycard. However, the savvy operative knows not to rush toward the obvious exit. Why settle for the main path when hidden treasures await?
Key Preparations in the First Lab:
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The Locked Armory: To the left of the entrance, a locked door bars the way. Using the freshly acquired keycard reveals a hallway leading to a security room containing a weapon crate. These crates are a potential goldmine, offering not just firearms but also valuable weapon mods, providing a crucial power boost before the trials ahead.

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The Hidden Shortcut: On the opposite side of the lab, a holding cell door swings open during the initial combat. Inside, a breakable panel awaits, vulnerable to grenades or other explosives. Destroying it creates a shortcut that drops players directly to the holding cells on the bottom floor—a clever time-saver for repeated farming runs.
After utilizing the shortcut or taking the stairs, progress is blocked by a viscous black goo. The solution? Target and destroy the glowing cysts infesting the substance to clear the path forward. This leads to another holding cell area and, ultimately, a portal.

Stepping through the portal introduces one of Silo EX1's most infamous challenges: The Traffic Light Room. This vast testing hall is crawling with Deviants, but the real enemy is the environment itself. Overhead lights cycle through a deadly sequence: green, yellow, and red. The rule is absolute: when the lights turn red, you MUST stop moving. Any motion—a step, a sidestep, a dodge—results in instant petrification and a frustrating teleport back to the room's entrance. During the red phase, you are a statue; you can still aim, shoot, reload, and even use healing items, but your feet must be planted. Success here is less about frenetic action and more about disciplined, rhythmic pauses. Can you master the patience required to navigate this lethal dance?
The grand finale of Silo EX1 is a confrontation with its monstrous guardian: an enormous Siren Deviant imprisoned in a circular arena. This boss fight is a direct escalation of the traffic light mechanic. The Siren itself is largely immune to damage, except for attacks directed at its prominent light arrays. These lights cycle through the same green-yellow-red pattern. Moving during the red phase is a death sentence, as petrification leaves you utterly vulnerable to the boss's devastating laser attacks.
Boss Fight Strategy Breakdown:
| Phase | Action Required | Key Danger |
|---|---|---|
| Green/Yellow | Aggressively target and shoot the boss's light arrays. | Swarms of lesser Gnawer Deviants that harass the player. |
| Red | CEASE ALL MOVEMENT IMMEDIATELY. You may continue to shoot and heal. | Instant petrification followed by lethal laser beams. |
| Higher Difficulties | Destroy external generators first to lower the boss's defenses. | Increased enemy health, damage, and mechanic complexity. |
Victory against the Siren Deviant is rewarded with the ultimate prize: opening the final reward chest grants a selection of Mask mods. These mods are the core objective, capable of transforming a build with powerful offensive effects. Furthermore, a rare bonus awaits the triumphant: there is a small chance for the elusive Atomic Lighter Deviant to spawn beside the chest, offering an additional challenge and potential loot.

In 2025, Silo EX1 remains a cornerstone of the endgame gear progression in Once Human. Its design teaches a valuable lesson: raw firepower is meaningless without strategy and situational awareness. From the hidden armory and shortcut in the first lab to the rhythmic freeze of the Traffic Light Room and the punishing pattern-recognition test of the Siren boss, every step is a calculated risk. For the solo operative or coordinated team aiming to perfect their loadout, mastering Silo EX1 is not just a task—it's a rite of passage. The path to the most powerful Mask mods is clear, but are you prepared to stand perfectly still when the world tells you to run? 🔥🎭