WarriorSTR · Melee fighters with the highest HP
MagicianINT · Spellcasters
BowmanDEX · Ranged attackers
ThiefLUK · Fast and evasiveBetween COT1 patch (4237b973) and COT1 patch (903789f6), the Classic World game files changed like this: monsters: 11 changed; quests: 3 changed; items: 2 added, 2 changed; crafting recipes: 2 changed; Cash Shop items: 2 added, 1 changed; game text line: 1 added. That's 5 added, 0 removed and 19 changed entries.
Test client. This build is from the closed online tests, before Founders Access. Progress from the tests didn't carry over, and entries here may never have reached the live game. What's live now is in our database pages.
- Monsters changed: Blue Mushroom, Cold Eye, Evil Eye, Fire Boar, Lupin and 5 more
- New items: GM's Blessing of Precision, GM's Blessing of Wind
Monsters (~11)
Changed (11)
Blue Mushroom- Level:
35→ 30 - AVOID:
23→ 18
- Level:
Cold Eye- Level:
35→ 30 - AVOID:
23→ 19
- Level:
Evil Eye- Level:
35→ 30 - AVOID:
31→ 25
- Level:
Fire Boar- Level:
35→ 30 - AVOID:
19→ 16
- Level:
Lupin- Level:
35→ 30 - AVOID:
19→ 16
- Level:
Zombie Mushroom- Level:
35→ 30 - AVOID:
30→ 24
- Level:
Curse Eye- AVOID:
16→ 12
- AVOID:
- Curse Eye
- Level:
35→ 30
- Level:
Horny Mushroom- Level:
35→ 30
- Level:
Jr. Necki- AVOID:
18→ 13
- AVOID:
King Slime- AVOID:
16→ 11
- AVOID:
Quests (~3)
Changed (3)
- Letter for Lucas
- Description (Stage 2):
Maria needs someone to help her. She wants you to deliver a letter to Lucas inAmherst.→ Maria needs someone to help her. She wants me to deliver a letter to Lucas in Amherst. - Description (Stage 3):
You delivered Maria's Letter to Lucas in Amherst.→ I delivered Maria's Letter to Lucas in Amherst.
- Description (Stage 2):
- Jane and the Mushroom
- Description (Stage 3):
I delivered the Horny Mushroom Caps and Wild Boar Tooths to Jane. I wonder if this will really change her father's mind... she's wearing bunny ears, for goodness sake! Ah well, it's none of my business. In return, Jane gave me a Scroll for ATT. My weapon's going to be awesome... if the scroll works.→ I delivered the Blue Mushroom Caps and Horny Mushroom Caps to Jane. I wonder if this will really change her father's mind... she's wearing bunny ears, for goodness sake! Ah well, it's none of my business. In return, Jane gave me a Scroll for ATT. My weapon's going to be awesome... if the scroll works.
- Description (Stage 3):
- Mrs. Ming Ming's First Worry
- Description (Stage 2):
I ran into Mrs. Ming Ming in Henesys, who is overcome with concern. She says there aren't enough decorations for the village festival, and asks you to get 10 Slime Bubbles and 20 Pig's Ribbons.→ I ran into Mrs. Ming Ming in Henesys, who was overcome with concern. She said there aren't enough decorations for the village festival, and asked me to bring 10 Slime Bubbles and 20 Pig's Ribbons.
- Description (Stage 2):
Items (+2 ~2)
Changed (2)
Companion's Magic Box- Name:
Companion’s Magic Box→ Companion's Magic Box
- Name:
Gift for the New Journey- Description:
Double-click to obtain the below items. - Leaf Points 1,000 Exchange Coupon x5 - Regular Store Permit x1 - Megaphone x10 - Super Megaphone x5 - Red Potion x30 - Blue Potion x30→ Double-click to obtain the below items. - Leaf Points 10,000 Exchange Coupon x5 - Regular Store Permit x1 - Megaphone x10 - Super Megaphone x5 - Red Potion x30 - Blue Potion x30
- Description:
Crafting Recipes (~2)
Changed (2)
Aquamarine- Meso Cost:
1,000 mesos→ 200 mesos
- Meso Cost:
Garnet- Meso Cost:
1,000 mesos→ 200 mesos
- Meso Cost:
Cash Shop (+2 ~1)
Cash Shop entries as listed in the client. Whether an item is actually on sale is decided on Nexon's side; see our Cash Shop coverage.
Added (2)
- GM's Blessing of Precision
- GM's Blessing of Wind
Changed (1)
- Water of Life
- Description:
A mysterious water gathered from the deepest valleys of Ellinia. It can extend a living pet’s active time, and if you bring it to Mar the fairy in Ellinia, she can restore a pet that has turned into a doll.→ A mysterious water gathered from the deepest valleys of Ellinia. It can extend a living pet's active time, and if you bring it to Mar the fairy in Ellinia, she can restore a pet that has turned into a doll.
- Description:
Game Text (+1)
Text the game shows you (messages, labels, tooltips, NPC and pet lines) that was added, removed or reworded, read directly from the game client and its text files.
Added (1)
- Trade cancelled.
How to read this: entries are matched by the game's own IDs, so a renamed item shows as changed, not as removed and added. Values are shown exactly as the files hold them ("none" means the field was empty). Names link to our database page when the entry is live in Classic World; test-only, hidden or removed entries are plain text. Program code changed too (28 functions added, 31 changed, 13 removed), but code isn't readable as game data, so it isn't listed. Server-side data like drop rates never appears here.
FAQ
What changed in the Closed Online Test 1 patch · Apr 16 build?
Comparing the two clients entry by entry: monsters: 11 changed; quests: 3 changed; items: 2 added, 2 changed; crafting recipes: 2 changed; Cash Shop items: 2 added, 1 changed; game text line: 1 added. In total 5 added, 0 removed and 19 changed.
Which builds are compared?
COT1 patch (4237b973) (archived Apr 13, 2026) against COT1 patch (903789f6) (archived Apr 16, 2026), both read from the game client files.
Does this include drop rate changes?
No. Drop tables, event switches and spawn timers live on Nexon's servers, not in the client, so a client comparison can't see them.
All builds: game data changelog · Official notes: Classic World patch history · Skills: skill changes