Drop Rate Display

A RuneLite plugin that shows the OSRS Wiki drop rate of loot you receive, wherever it appears — on the ground, on a reward screen, or in your inventory.

There is no dependency on the Loot Tracker plugin. Monster drops come from RuneLite's core LootManager; everything else is detected directly from game messages, reward interfaces and menu actions.

Screenshots

Floor drops — every item on a stack gets its own rate, flush after its Ground Items line:

Reward screens — the rate is painted on each item (clue caskets, chests, raids, the Perilous Moons Lunar Chest, and more):

Inventory loot — the rate is also printed to chat (here, a Brimstone chest):

Where the rate shows

• Floor drops (monsters and bosses) — with the core Ground Items plugin on, the rate is placed flush after each item's line (Mithril boots (GE: 2,025 gp) 1/128), aligned per item so a pile of 2+ drops each gets its own rate. This reproduces Ground Items' own layout from public data (no reflection, no dependency). Without Ground Items, turn off Merge with Ground Items for a self-labelled Ensouled goblin head (1/35) line.
• Reward screens — the rate is painted directly on each item on the reward interface: Barrows, Chambers of Xeric, Theatre of Blood, Tombs of Amascut, Perilous Moons (Lunar Chest), Fortis Colosseum, Fishing Trawler, Drift Net and clue caskets.
• Inventory loot — a chat line plus the rate on the item's icon for ~30 seconds. Covers:
  • Pickpockets and ship salvage
  • World chests — Brimstone, Crystal, Larran's, Elven, Grubby, Muddy, Ancient Vault, and more
  • Opened containers — caskets, lockboxes, gem bags, Camdozaal/frozen caches, potion packs, the Mahogany Homes supply crate, Soul Wars spoils, seed packs, and any other item whose name has a wiki drop table
  • Skilling minigames — Tempoross, Guardians of the Rift, Wintertodt
  • Herbiboar and the Unsired

Rates read from the wiki (1/512, 100/2,440, Always, Uncommon). On the roomy ground line and in chat the full wiki rate is shown; on the space-constrained item icons it's normalised to a rounded 1/N (100/2,440 → 1/24).

Configuration

Settings are grouped into four sections:

• Displays — where rates appear (ground items, chat, inventory items, reward screens) and Merge with Ground Items (append the rate to each Ground Items line, or draw a self-labelled line).
• Filters — Minimum rarity (only show 1/N or rarer; 0 shows all), Show qualitative rates (Uncommon/Rare…), and Show guaranteed drops (Always).
• Rate format — a dropdown per surface (floor drops, chat, reward screens, inventory), each Exact (100/2,440), 1 in X (1/24.4, as the wiki renders it), or 1 in X (rounded) (1/24). Roomy surfaces default to exact, tiny item icons to rounded.
• Rarity colours — a colour per tier, so the colour tells you the rarity at a glance: Common (≤ 1/50) → Uncommon (≤ 1/500) → Rare (≤ 1/5,000) → Ultra-rare (rarer). All rate text is outlined for legibility on any background.

Data

Drop rates are bundled in src/main/resources/drop_rates.json (~2,000 sources, ~34,000 drops), generated from the OSRS Wiki's dropsline Bucket. The wiki does not expose numeric item ids in its drop data, so the file is keyed by item name and the plugin resolves an item id to a name at runtime via ItemManager. Activity names are mapped to their real wiki page (e.g. Chambers of Xeric → Ancient chest, Wintertodt → Reward Cart).

Regenerating the data

scripts/generate_drop_rates.py rebuilds the bundled file, respecting the wiki's 1 request/second courtesy limit.

pip install requests

# Refresh only specific sources (fast):
python scripts/generate_drop_rates.py --sources "Abyssal demon,Vorkath,Chest (Barrows)" \
    -o src/main/resources/drop_rates.json

# Full rebuild of every drop table on the wiki (slow, several hundred requests):
python scripts/generate_drop_rates.py --full -o src/main/resources/drop_rates.json

Building

./gradlew build      # compile + run the tests
./gradlew run        # launch a RuneLite dev client with the plugin loaded

Requires JDK 11.

Known limitations

• Coverage is limited to what the wiki's dropsline template records (it excludes, e.g., bird-nest seed sub-tables and skilling success rates). Point/ticket shops (Mahogany Homes points, Soul Wars, Castle Wars) are intentionally out of scope — their supplies are bought, not random loot.
• Same-named NPC variants with different drop tables are matched by name; NPC ids are bundled for future id-based disambiguation.

Support

If this plugin is useful to you, you can support development on Ko-fi: ko-fi.com/frailrain — thank you!

Licence

BSD 2-Clause. See LICENSE.