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Securement Silo Progression Guide: Order, Bosses & Drops

πŸ“Œ Executive Summary & Key Takeaways

The optimal order to clear Once Human's Securement Silos, every boss mechanic in brief, and which Silos to farm for mods and blueprints.

Why Silos Are Your Progression Backbone

Securement Silos are instanced dungeons that gate gear progression: they drop weapon and armor mods, blueprint materials, Deviations, and Memetic currency. Each seasonal phase unlocks higher-tier Silos, and hard modes recycle earlier Silos with better loot.

Recommended Clear Order

  1. Alpha (Lv 10+, Dayton Wetlands) β€” tutorial-tier; shield-unit boss teaches positioning.
  2. Theta (Lv 15+, Dayton Wetlands) β€” Arachsiam spider; destroy web nests to stop heals.
  3. Bravo (Lv 20+, Broken Delta) β€” Heavy Gunner; use pillars, strip armor plates.
  4. Charlie (Lv 25+, Broken Delta) β€” Treant; bring Burn damage, kill root tendrils.
  5. Delta (Lv 30+, Iron River) β€” The Warden; dodge ground-crack slams, burst the stagger.
  6. Sigma (Lv 35+, Chalk Peak) β€” Ravenous Hunter; hip-fire tracking, punish feeding phases.
  7. Phi (Lv 40+, Red Sands) β€” Forsaken Giant; break leg armor, group during sandstorms.
  8. Psi (Lv 45+, Blackheart) β€” Shadow Hound pack; assign an add-clearer, stay grouped.

Beyond Silos: Monoliths and Raids

Monoliths are enhanced boss encounters (Greed, Thirst) with extra phases and better drop tables β€” treat them as gear checks for your build. The LEA Research Lab raid and its Nightmare Feaster is the endgame PvE wall: phase mechanics demand assigned positions, add control, and optimized status builds. Prime Wars are large public boss events β€” show up with anti-boss DPS and rotate energy nodes.

Farming Advice

  • Hard-mode Silos are the primary source of Tier IV-V mods β€” farm the highest you can clear weekly.
  • Match the Silo to your build: farm where your archetype’s mods drop.
  • Duo or trio runs are the sweet spot for speed; full squads split aggro nicely for boss burst windows.

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