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OS Occupation

Guide

OS Occupation is the story memorial that follows Old Memories in Episode 17.1. You join Est's rebel squad as call sign Echo and storm the OS facility. You hold the gas-filled entrance, follow the missing Alpha team's trail through two outposts, and face the mutant waiting at the end.

Requirements and entry

Quest Finish Old Memories, then take OS Occupation from Est
NPC Est at /navi sp_cor 163/56
Party Required. Only the party leader can prepare the memorial.
Time limit 2 hours

Est is hidden until you have finished Old Memories. Walk up to her spot in Cor and she appears. Talk to her once to get the OS Occupation quest. Then the leader talks to her again and picks Prepare for OS Occupation., and everyone picks Enter.

Walkthrough

1. Holding the entrance

  1. The memorial starts when the party leader steps forward from the landing point (30/352). The rebel squad and Est appear, and poison gas lingers around the entrance.
  2. While Est talks on the radio, up to 12 incomplete mutants (A013 - Caput #20348, A013 - Dolor #20349 and A013 - Bellare #20350) spawn around the entrance, one every 10 seconds. Fight them off.
  3. When Est calls for Echo, click the radio next to her (29/360) and send any reply. Do it a second time when she asks you to check Alpha's coordinates.
  4. Foxtrot's artillery wipes out every mutant and the gas around the entrance. Est then sends you the coordinates of Alpha's last contact.

2. Following Alpha's trail

  1. Go to the radio at 52/177 and report that there is only a radio, no trace of Alpha. Eight mutants spawn along 63/214-242.
  2. Kill them all. The map announces how many survivors are left every 10 seconds. When it says Intermediate point secured., a marker appears at 84/256. Step on it.
  3. Thirteen more mutants spawn along the road around 126-174/266, plus another gas cloud. Clear them and step on the marker at 163/266.
  4. Fifteen mutants spawn around 132-151/196-243. Clear them and step on the marker at 138/174.

3. The last point

  1. A mutant marked ???? (a Miguel G. #20347) appears at 161/178. It spawns with only 5% of its HP, so it goes down quickly.
  2. When it dies, Est and the fallen Miguel appear at 165/176. Talk to Est to finish the story.

Rewards

You get these from Est while your OS Occupation quest is active:

Reward Amount
Damaged Weapon #25668 1
Cor Core #25723 5
Base / Job EXP 300,000 / 300,000

Est then sends you back to /navi sp_cor 162/63. The quest is completed, so the reward is one-time.

Tip

After the story, the Operation Officer next to Est in Cor opens the repeatable version of this map, 2nd OS Search.

Overview

  • Entrance: Est at sp_cor 163/56 (/navi sp_cor 163/56)
  • Requirements: Unlocked by its story quest, time limit 2h
  • Entry: Once per character. It is part of the story: the entrance only opens while that story step is active, and you can retry until you clear it. Run again in 2nd OS Search.
  • Who can enter: Party (create a party first)

Bosses

Drop chances include Miracle's drop rates.

Miguel #20346

MVP · Level 115 · 8,600,000 HP · Demihuman · Wind 4 · Medium · Full monster entry

Item Chance
Yggdrasil Berry #607 50% MVP reward
Yggdrasil Seed #608 50% MVP reward
Tiger Skin #1029 100%
Mysterious Component #25669 100%
Damaged Weapon #25668 10%
Cor Core #25723 100%
Apple #512 5%
Miguel Card #27318 0.5%
Miguel G. #20347

Boss · Level 115 · 8,600,000 HP · Demihuman · Wind 4 · Medium · Full monster entry

No drops.

Manhole #20351

Boss · Level 1 · 1,000 HP · Formless · Neutral 1 · Medium · Full monster entry

No drops.

Monsters

Monster Level HP Race Element
A013 - Dolor #20349 111 31,000 Demihuman Poison 3
A013 - Bellare #20350 112 38,000 Demihuman Neutral 2
A013 - Caput #20348 110 31,000 Demihuman Dark 2

Rewards and quest items

Items the instance NPCs hand out, including quest items used along the way.

Item Amount
Damaged Weapon #25668 1
Cor Core #25723 5
Mysterious Component #25669 5

Exchange and crafting

NPCs outside the instance that take what you bring back from it.

NPC Takes Gives
Elyumina
sp_cor 111/130
Damaged Weapon #25668 Upgrades or quest use