Quest Episode CH 1 (Zerocell Extension)
GladiusRO Story Progression Guide
This guide explains the required story order for players continuing from Episode 19 to Episode 20, Episode 21, Episode CH 1, and finally the CH 1 Zerocell Extension.
Do not skip a chapter. Many NPCs are intentionally silent or unavailable until the previous chapter's completion quest is finished.
Quick Progression Overview
- Complete Episode 19.
- Continue into the GladiusRO Episode 20 storyline.
- Complete Episode 20 and continue into Episode 21: Age of Heroes.
- Complete Episode 21, including the chapter-completion quest.
- Begin Episode CH 1: Call of the World Tree.
- Complete the main CH 1 storyline.
- Reach at least Base Level 260 and unlock the Zerocell Extension.
- Complete the Zerocell introduction and daily laboratory quests.
- Reach Base Level 265 to unlock Rune Crown crafting and enchanting.
- Reach Base Level 270 for the Vita and Arc laboratories.
Episode 19
Episode 19 is the first required chapter in this continuous GladiusRO story route.
What players should do
- Follow the Episode 19 main quest markers and navigation entries.
- Complete all required main-story quests.
- Do not discard story-related items until the chapter is complete.
- If the next chapter does not become available, check the Quest Window for an unfinished Episode 19 main quest.
Completion check
Episode 19 must be fully completed before beginning the GladiusRO Episode 20 continuation.
Episode 20
Episode 20 continues directly from the completed Episode 19 storyline on GladiusRO.
What players should do
- Continue using the Episode 20 quest markers and NPC dialogue.
- Complete the main Episode 20 chain in order.
- Finish all mandatory investigation, battle, and return-to-NPC steps.
- Revisit the last Episode 20 story NPC after completing the final objective.
Completion check
The character must complete the Episode 20 ending before the Episode 21 continuation becomes available.
Episode 21: Age of Heroes
Episode 21 continues from Episode 20 and introduces the Age of Heroes storyline, new maps, instances, reputation content, exchanges, and equipment systems.
Main progression
- Begin Episode 21 after completing Episode 20.
- Follow the Episode 21 main-story quest markers.
- Complete the required investigations and battles.
- Complete the Episode 21 final story sequence.
- Finish the Episode 21 chapter-completion quest.
The Episode 21 completion chain reaches quest 18360. Some Episode 21 merchants require this quest to be completed before responding.
Episode 21 merchant locations
Wigner Merchant Popo
- Map:
mbase_in - Coordinates:
220,127 - Provides Episode 21 standard goods and additional goods when the relevant requirements are satisfied.
Mage Lobelia
- Map:
mbase_in - Coordinates:
228,131 - Provides the Mana Stone exchange.
Wigner Merchant Operator
- Map:
mbase_in - Coordinates:
232,122 - Provides Yorscalp Fly Wings, Card Fragment exchange, and Yorscalp Crown exchange.
Episode CH 1: Call of the World Tree
Requirements
- Complete Episode 21.
- Minimum Base Level: 200.
Starting Episode CH 1
The starting NPC is the Small Ash Tree.
- Location 1:
prt_fild05,353,252 - Location 2:
pay_fild01,308,341 - Initial quest: 18368
Follow the World Tree and dimensional-distortion storyline, including the Second World's Geffen and Dark Whisper content. Complete every return-to-NPC dialogue after hunts and investigations.
The main CH 1 completion function uses completed quest 18377. Complete the main CH 1 storyline before attempting Zerocell.
Main CH 1 shops
Gold Root Coin Exchanger
- Location:
ygg_fruit,165,126 - Before CH 1 completion: basic Traveler's Leaf shop.
- After CH 1 completion: Gold Root Coin, Mana Ring, and material exchanges.
Hotbear Mur
- Location:
ygg_fruit,168,124 - Unlocks Entwined Equipment and Dimensional World footwear shops after CH 1 completion.
- Before completion, Hotbear Mur only gives preparation dialogue.
CH 1 Zerocell Extension
The Zerocell Extension takes place after the main CH 1 storyline and introduces four laboratories:
- Zerocell - Lux
- Zerocell - Nox
- Zerocell - Vita
- Zerocell - Arc
Entry requirements
- Main Episode CH 1 completed.
- Quest 18379 completed.
- Base Level 260 or higher.
Starting Zerocell
- NPC: Robin
- Location:
ygg_edge,173,185
Robin is progression-controlled and may remain silent when the requirements are not met. When all requirements are satisfied, Robin gives quest 27089.
Zerocell introduction route
Quest 27089: Investigation begins
- Speak to Robin at
ygg_edge,173,185. - Travel with Robin and Newt to the invaded site.
- Follow the marker into
ch1fild1.
Quest 27090: Suspicious facility
- Meet Robin and Newt in
ch1fild1. - Investigate the facility and its dimensional barrier.
Quest 27091: Scattered documents
- Search the area for the five scattered documents.
- Read the information about Homunculus Laboratory Zerocell.
- Return to Robin.
Quest 27092: Dimensional resistance
- Continue with Newt, Robin, and Rubiel.
- Learn why Mana Rings are required to resist the laboratory's dimensional magic.
Quest 27093: Operations unlocked
- Complete Robin's operational briefing.
- Zerocell daily laboratory missions become available.
Laboratory requirements
Lux and Nox
- Minimum Base Level: 260
- Mana Rings required for resistance: 50
- Mission objective: defeat 300 Homunculus enemies.
Vita and Arc
- Minimum Base Level: 270
- Mana Rings required for resistance: 70
- Mission objective: defeat 300 Homunculus enemies.
Zerocell map list
- Lux:
ch1zero1 - Nox:
ch1zero2 - Vita:
ch1zero3 - Arc:
ch1zero4
These maps restrict teleport, memo, and normal saving. Use the intended NPC route.
Daily mission and cooldown quests
- Lux:
27094/ cooldown27095 - Nox:
27096/ cooldown27097 - Vita:
27098/ cooldown27099 - Arc:
27100/ cooldown27101 - Newt's laboratory-entry explanation:
27102
Completing a laboratory mission rewards Root Coins/Mana Rings and a bonus reward item.
Zerocell Formula and Rune Crown Shop
Bitoli
- Location:
ygg_fruit,162,126 - Required unlock: quest 27094 completed.
Before quest 27094 is complete, Bitoli only mentions a rumor about a newly discovered invaded site.
After quest 27094, Bitoli offers:
- Purchase Magic Tuning Formulas
- Craft Rune Crown
- Enchant Rune Crown
Rune Crown crafting and enchanting require Base Level 265 or higher. Crafting is separated into Swordsman, Merchant, Thief, Mage, Acolyte, Archer, and Expanded class categories.
General prt_mk Barter Marketplace
The general GladiusRO equipment exchange marketplace is on prt_mk. A confirmed starting point is prt_mk,150,125. These shops are separate from the Episode 21, CH 1, and Zerocell story shops.
Troubleshooting
An NPC appears but says nothing
Check the required chapter, quest, and Base Level. Silent NPCs are usually progression-locked rather than broken.
Robin is silent
Confirm main CH 1 completion, quest 18379 completion, and Base Level 260 or higher.
Complete quest 27094. Rune Crown options additionally require Base Level 265.
Hotbear Mur does not show equipment shops
Complete the main CH 1 storyline.
Episode 21 merchants are silent
Complete Episode 21 quest 18360.
Unknown Item, missing icon, invisible monster, or broken map
Close the client, run the latest GladiusRO patcher, and report the exact item, monster, or map name with a screenshot if the problem remains.
Player Checklist
[ ] Episode 19 completed [ ] Episode 20 completed [ ] Episode 21 completed [ ] Episode 21 quest 18360 completed [ ] Episode CH 1 started from the Small Ash Tree [ ] Main CH 1 completed [ ] Quest 18379 completed [ ] Base Level 260 reached [ ] Zerocell quest 27089 started [ ] Zerocell introduction quests 27089-27093 completed [ ] Quest 27094 completed [ ] Base Level 265 reached for Rune Crown systems [ ] Base Level 270 reached for Vita and Arc
Final Progression Route
Episode 19 ↓ Episode 20 ↓ Episode 21: Age of Heroes ↓ Quest 18360 complete ↓ Episode CH 1: Call of the World Tree ↓ Main CH 1 + quest 18379 complete ↓ Base Level 260+ ↓ CH 1 Zerocell Extension ↓ Lux / Nox ↓ Quest 27094 complete + Base Level 265 ↓ Rune Crown crafting and enchanting ↓ Base Level 270 ↓ Vita / Arc