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
- 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. - 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. - 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. - 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
- Go to the radio at
52/177and report that there is only a radio, no trace of Alpha. Eight mutants spawn along63/214-242. - 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. - Thirteen more mutants spawn along the road around
126-174/266, plus another gas cloud. Clear them and step on the marker at163/266. - Fifteen mutants spawn around
132-151/196-243. Clear them and step on the marker at138/174.
3. The last point
- A mutant marked ???? (a
Miguel G. #20347) appears at 161/178. It spawns with only 5% of its HP, so it goes down quickly. - 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 |
|---|---|---|
Elyuminasp_cor 111/130 |
Damaged Weapon #25668 | Upgrades or quest use |