Main story · Defeat the Hedron

Sever the Hedron Links

Oldest House → Unknown · Main story #10Open the Unknown, then sever both Hedron Links

Reach the Unknown from the Oldest House, progress Pope's Research to open Gravity Well routes between islands, then sever the Link at the Patterned Evac Building and the Patterned Field Office. Defeat Hedron Factor and Hedron Proxy in either order. The quest ends as soon as both Links are severed.

Find why I'm blocked

Unknown
Pope's Research required
2 Hedron Links · 2 bosses

Quest state

Two of the four steps happen in the Unknown. The Link order is free, so this page tracks two parallel objectives, not a numbered list.

Unknown へ到達
Unknown を開く
Hedron Link トラッカー2×
クエスト完了

Choose either Link. The order does not matter.

Why can't I reach the quest marker?

The marker is on another island and there is no route to it yet.

You have probably not opened the Gravity Well that connects that island. This is not a bug and it is not a platforming problem: the Unknown is opened by Pope's Research, not by jumping harder.

Progress Pope's Research
Set up the Probe Relays
Create the Gravity Well
Then the route between islands opens

Once the routes are open, both Hedron Links can be attempted in either order.

Continue Pope's Research

Required during this questREQUIRED_DURING

Pope's Research is required, but not before you start

You can start Sever the Hedron Links immediately. Pope's Research is what opens the routes required to reach its objectives, so progress it until both Link routes are open.

Open Pope's Research

Pope's Research

Gravity Wells

How far Pope's Research must go is still being verified. The safe rule is: open the Gravity Well routes you need for both Links.

Quest state

Four states, not twenty steps. Phase 3 holds two parallel objectives you can finish in any order.

Phase 1 of 4

Unknown へ到達

Pope の上の階へ行き、エレベーターで Oldest House から Unknown へ向かいます。

You are here

Route

Pope の上の階へ行く
エレベーターで Roof Access へ
Unknown へ入る
Oldest House Rooftop Fast Travel Door を起動

Landmark

Pope の上のエレベーターと Oldest House Roof Access

If you are stuck

Oldest House から出る道が見つからない場合は、1 階ではなく Pope の上の階を確認してください。

Progression convenience

Don't skip: Oldest House Rooftop Fast Travel Door

Activate it the first time you reach the Unknown. This quest sends you back and forth between the Unknown, the Oldest House and Pope many times, so this door saves the elevator trip every single time.

Quest state

Unknown へ到達

Unknown を開く

両方の Link の Gravity Well ルートが開くまで Pope's Research を進めます。

Route

バルーンを撃ち落とす
落下したクレートを壊す
Probe Relay を正しい赤い円に置く
ライトが緑になったのを確認する
Gravity Well で次の島へ渡る

Landmark

Unknown の浮遊島群

If you are stuck

Unknown はこのループで開くので、ルートの欠落はほぼ必ず Probe か Gravity Well の手順が未完了であることを意味します。

Route progress

Cut down a Balloon
Break the crate it drops
Place the Probe Relay in the correct red circle
Confirm the green light
Use the Gravity Well to reach the next island

Full balloon and relay locations

How to know a Probe is correct

The correct circle is marked on the minimap
The beeping gets stronger as you close in
The Probe light turns green after a correct placement

If a light is not green, that Probe is in the wrong circle. Fix it before you look for the Gravity Well.

Full balloon and relay locationsOpen Pope's Research

Gravity Wells

A completed Probe set creates a Gravity Well, and the Gravity Well opens the travel route to the next island. This is the actual thing that makes a quest marker reachable.

Gravity Wells are a world mechanic, not a one-off item. They also matter for other Unknown content, so treat them as navigation, not loot.

The Hedron LinkUnknownelevator
UnknownUnknown 南部gravityWell
UnknownUnknown 北東部gravityWell

Quest state

Pope's Research を進める

Hedron Link トラッカー

どちらの Link でも構いません。順序は自由です。

Hedron Link tracker

Choose either Link. The order does not matter.

Link A
Patterned Evac Building
Boss: Hedron Factor
Show route
Link B
Patterned Field Office
Boss: Hedron Proxy
Show route

Quest state

Patterned Evac Building
Patterned Field Office

Hedron Link tracker

Choose either Link. The order does not matter.

0 / 2 severed

0 / 2 severed0 / 2

1 Link remaining

Link A

Patterned Evac Building

Route: Unknown 南部Boss: Hedron Factor

Show route

南の島へ向かう
Evac Building へ続く道を進む
Link 島へ渡る足場を見つける
渡る
テレビと対話して Hedron 領域へ入る

主要ルートから見える独立した Link 島

Boss strategyウェーブ型ボス

Hedron Factor

重装フェーズ
重装フェーズ: エリートに集中攻撃 → 体力が青いしきい値に達する → 重装の敵が戻る: ループを繰り返す
群集 + 地雷
群集フェーズ: 小型の敵を片づける → 動き続けて地雷を避ける

繰り返すウェーブ戦と考えてください。エリートを瞬間火力で倒しても戦闘は終わりません。

Hedron Factor は Patterned Evac Building Link のボスです。Hedron ファミリーの関係が確定するまで、正規のボスページは gated のままです。

Link B

Patterned Field Office

Route: Unknown 北東部Boss: Hedron Proxy

Show route

北東の島へ向かう
Oldest House / Field Office 方向のルートを進む
足場を使って Link 島へ渡る
テレビと対話して Hedron 領域へ入る

北東側の独立した Link 島

Boss strategy多体チャージ反撃

Hedron Proxy

多体チャージ反撃
分離した重装個体を追う → チャージを待つ → 横へ回避する → 隙を突いて反撃する → 一度に 1 体ずつ倒す
終盤フェーズ
重装の突進を追いながら小型の敵にも注意してください。複数の個体にダメージを分散させないこと。

これはウェーブ戦ではなくターゲット管理の戦いです。分離した重装を 1 体倒してから次に移ってください。

Hedron Proxy は Patterned Field Office Link のボスです。Hedron ファミリーの関係が確定するまで、正規のボスページは gated のままです。

Both bosses share one rule

Hedron enemies resist Raw damage. If your damage suddenly looks flat, switch to secondary attacks, Fire, Mold or Hedron abilities before you blame your level.

Why Raw damage is weak

Quest complete

2 / 2 Links severed

Both Links severed ends this quest and continues straight into Rebuild, a flashback sequence that starts automatically.

0 / 2 severed

Link A: Patterned Evac Building; Hedron Factor
Link B: Patterned Field Office; Hedron Proxy
Reward: Living Shard; Achievement: Stop it At the Source

One boss dead but the quest is still active

That is expected. Severing one Link leaves the other one. Check the tracker, then head to the remaining Link. There is no hidden completion interaction to find.

Loot from the Hedron Factor and Hedron Proxy encounters is not part of the quest reward. The exact reward bundle is still being verified.

Immediate transition

Story transition ahead

Finishing the second Link immediately continues into the next main-story sequence. Consider wrapping up anything urgent first.

This is a heads-up, not a point of no return. Whether free exploration pauses during that sequence is still being verified.

What next?

Both Links severed ends this quest and continues straight into Rebuild, a flashback sequence that starts automatically.

Continue to Rebuild

Need to finish side content first?What To Do Next

Quick diagnosis: the unknown route is missing

Step 1 of 3

すべての Probe Relay のライトは緑ですか?