Metin2 Drop Rate Explained: How PCT Values Really Work in mob_drop_item.txt

If you have ever opened your mob_drop_item.txt file and seen something like this:

Group WolfDrop
{
    Type    kill
    Mob     101
    kill_drop  1000
    1    27001    1    10    30
    2    27002    1    5     15
}

…you might have assumed the numbers 10 and 30 are percentages. They are not. This is the single most common mistake Metin2 private server admins make, and it leads to items that either never drop or drop far too often.

This guide explains the full drop rate formula, the level-difference penalty, and how to calculate the exact drop chance for any item on your server — no guessing required.

1. The Five Drop Files — Where mob_drop_item.txt Fits

Metin2 uses five separate configuration files to control loot. Understanding which one does what is essential before touching any of them:

  • mob_drop_item.txt — Per-mob drops on kill. The most commonly edited file.
  • common_drop_item.txt — Shared drops for all mobs within a level range.
  • etc_drop_item.txt — Drops linked via the drop_item field in mob_proto.
  • special_item_group.txt — Contents of chests and boxes.
  • drop_item_group.txt — Drop groups for stones and specific entities.

Each file has its own format and probability rules. This article focuses on mob_drop_item.txt, but the core formula applies to all of them.

2. What the PCT Numbers Actually Mean

Each item line in a group block has five numbers:

index    item_vnum    count    pct_min    pct_max

The game engine picks a random number between pct_min and pct_max and then divides it by 1,000,000 (one million). That gives the base probability.

Example: pct_min = 10, pct_max = 30

  • Average value = 20
  • Base drop chance = 20 / 1,000,000 = 0.002%
  • Average kills needed = ~50,000

If you wanted a 1% drop rate, you would need:

  • 1% = 0.01 = x / 1,000,000
  • x = 10,000

So pct_min = 8000, pct_max = 12000 would give you approximately a 1% drop rate — before any level modifiers.

3. The Level-Difference Penalty

This is where most admins get surprised. The base drop chance calculated above is not what players actually experience. The game applies a level-difference multiplier based on how far the player's level is from the mob's level.

The rules are:

  • Player level ≤ mob level + 5: Full drop rate — no penalty
  • Player 5–15 levels above mob: Linear reduction from 100% down to ~1%
  • Player more than 15 levels above mob: Drop rate approaches zero
  • Player below mob level: Small penalty also applies

This means a level 90 player farming a level 70 mob (20 levels below) will get virtually no drops at all — even if your PCT values are correctly set for a level-appropriate player.

This is why high-level players complain that farming feels broken. It is working as intended — but most admins do not realise the penalty is that steep.

4. How Other Modifiers Stack

After the level penalty is applied, additional multipliers are stacked on top:

Modifier Multiplier
Boss mob (rank BOSS or KING) ×1.5
Premium account ×1.5
Double-item event ×2.0
Thief gloves ×1.1

These are multiplicative, not additive. A premium player with thief gloves on a double-item event farming a boss gets: base × 1.5 × 1.5 × 2.0 × 1.1 = base × 4.95. Nearly 5× the base rate.

5. A Worked Example

Let's say you want a rare item to drop from a level 60 mob at a rate of approximately 0.5% per kill for a level-matched player.

  1. Target probability: 0.5% = 0.005
  2. PCT value needed: 0.005 × 1,000,000 = 5,000
  3. Set: pct_min = 4000, pct_max = 6000
  4. Average kills needed at equal level: ~200
  5. A player 10 levels above would need ~2,000 kills for the same item

Want to skip the math? Use the Metin2 Drop Table Calculator — paste your group block, set player and mob level, and instantly see the real drop percentage for every item in the table.

6. Common Mistakes Admins Make

  • Setting pct = 100 thinking it means 100% — it means 0.01%, not 100%
  • Not accounting for level difference when testing — always test with a character at the mob's level
  • Forgetting that multiple items roll independently — each item in a group has its own independent roll per kill
  • Misunderstanding kill_drop — this scales yang drops, not item drop rates
  • Setting the same pct values for bosses and normal mobs — bosses already get a ×1.5 bonus, so your rare items will drop more often than intended

7. Editing Your Drop Files

Once you understand the formula, managing your drop files becomes much easier with the right tools:

All tools run entirely in your browser — no upload, no account required.

Conclusion

The PCT values in mob_drop_item.txt are not percentages — they are raw values divided by one million. After the base rate is calculated, the level-difference penalty can reduce it to near zero. Understanding this formula is the difference between a well-balanced drop economy and one where players either farm nothing or flood the server with rare items.

Use the Drop Table Calculator to verify your drop rates before every server release, and check the Metin2 Tools hub for all the tools you need as an admin.