WarriorSTR · Melee fighters with the highest HP
MagicianINT · Spellcasters
BowmanDEX · Ranged attackers
ThiefLUK · Fast and evasiveNo game-data entries changed between COT1 patch (903789f6) and COT1 patch (c80c0a8a). Items, monsters, maps, quests and skills are identical; only the program code differs.
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.
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 (2 functions added, 3 changed, 0 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 20 build?
No game-data entries changed between these two clients. Only the program code differs (3 functions changed, 2 added), and code isn't readable as game data.
Which builds are compared?
COT1 patch (903789f6) (archived Apr 16, 2026) against COT1 patch (c80c0a8a) (archived Apr 20, 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