Story Expansion Part 2: The Holo-Key & Bunker Cities
In late 2025, Endnight Games released the massive **Version 1.1 Update**, formally titled "The Second Artifact." This expansion continues the mystery of the Cube and introduces the **Bunker-Cities**, a sprawling underground civilization biome that spans the northern reaches of the island. This guide details the 2026 technical journey to the end-game.
🗝️ The Holo-Key Activation
- Location: Deep within the 'Luxury Bunker' (Northern Shore), behind a high-frequency jamming wall.
- Requirement: You must have completed the first Cube activation and possess the **Golden Armor (Tier 5 Upgrade)**.
- Interaction: The Holo-Key is a temporary item that allows players to "Unphase" the Bunker-City entrances found in the Arctic Peaks.
Exploring the Bunker-Cities
The Bunker-Cities are not traditional caves; they are procedurally arranged urban ruins beneath the frost. They introduce a new type of environmental hazard: Static Shroud.
❄️ Thermal Building
Buildings in the Arctic Peaks and Bunker-Cities require **Stone Thermal Insulation**. Standard wood cabins will drain player stamina due to the "Deep Freeze" debuff (-50% HP regen).
🔦 UV-Flares
The Bunker-Cities are infested with "Shadow-Creep" mutants. Traditional flashlights are ineffective; you must use **UV-Flares** to temporarily stun them for physical combat.
The Second Cube Event
Activation of the second Cube requires 8 players (or AI companions) to synchronize the frequency on the 'Artifact Pillars' located across the mountain.
Server Meta: On multiplayer servers, this event triggers a global **Mutant Raid wave** for 10 minutes. Admins should ensure ServerPerformanceMode=true is active during this window.
Recommended Gear for 1.1 Content:
| Item | Obtained | Use Case |
|---|---|---|
| Arctic Pickaxe | Bunker Entrance | Mining 'Solafite-Ice' for thermal upgrades. |
| Holo-Key | Luxury Bunker | Unlocking the city gates and Cube terminals. |
| Insulated Suit | Crafted | Mandatory for surviving the Bunker-City depths (T > -30°C). |
Is there a new boss?
Yes. The **"Sub-Guardian"** awaits at the heart of the first Bunker City. It requires high-voltage electricity weapons (like the upgraded Stun Baton) to bypass its metallic armor.
Can I bring vehicles underground?
The **Knight.V** can be used in the main corridors, but the narrow shafts require the new **Grappling-Drones** added in 1.1 for vertical movement.
What happens at the end of Part 2?
Activating the Second Cube reveals the location of the **Third Island**, setting the stage for the rumored "Forest 3" or a final 1.2 content drop later in 2026.
Next Steps
- Optimize Large Builds with the BCU Tool
- Thermal Insulation & Arctic Building Guide
- Back to Sons of the Forest Wiki Home
Arctic-Ready Infrastructure: Supercraft’s SotF servers are pre-tuned for the 1.1 Expansion. We offer high-frequency CPU cores to ensure synchronous Cube events and zero-lag Bunker-City exploration for groups of up to 32.
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