Unofficial Coal LLC Wiki v1.4.1.1

Fan-created player reference for Coal LLC — a 2D side-scrolling mining game.

Dig through layered biomes, sell ore for cash, and survive 15 days (25 for an extended win). Hire employees, find chests with passive upgrades, and optimize your mining operation.

Note: this wiki is a fan-created unofficial reference and is not affiliated with the developer of Coal LLC, Bye Bye Ocean.

The Mine

Eight biomes descend from the surface. Each biome has exponentially higher block HP — and more valuable ore to match. You must build enough damage to progress deeper.

Clay
Depth 0–2 · HP scale ×1
Stone
Depth 2–5 · HP scale ×10
Ice
Depth 5–8 · HP scale ×100
Fire
Depth 8–11 · HP scale ×1,000
Dark
Depth 12 · HP scale ×100,000
Green
Depth 13 · HP scale ×10,000,000
Orange
Depth 14 · HP scale ×1,000,000,000
Purple
Depth 15 · HP scale ×100,000,000,000

Key Systems