Drillbit Depths

Drillbit Depths is a side-view digging arcade. You drive a chunky drill rig down through a 500 metre cross-section of the earth, grind through soil and rock, collect ore, and lift it home to the Outpost to sell it for Cogs.

HOW IT PLAYS
Touch and hold where the rig should go: down, left, right, or up through your own tunnel. The drill chews through tiles at a speed that depends on how hard the tile is and how strong your drill is. Fuel, Hull and the Hold fill level are always on screen. Tap Lift to winch the rig home, or tap Boost to push through harder ground.

HAZARDS
Gas pockets, lava and water slow you down or wear the Hull. A long fall damages the rig. If the tank runs dry or the Hull is wrecked, a rescue winch brings the rig home, but part of the ore is left behind.

FIVE LAYERS, SEVEN ORES
The mine has five depth layers, each with its own soil, hazards and ore. Seven kinds of ore are worth different amounts of Cogs, from common nuggets near the surface to a rare gem at the very bottom. Lift stations along the shaft let you ride home for nothing.

CONTRACTS
20 contracts, four on every layer: reach a depth, deliver a set amount of one ore, haul a target in a single trip, or break into caves. Earn up to three stars on each one, with bonus stars for finishing in few trips and without a rescue.

DAILY CONTRACT
A seeded contract every day, the same for everybody on the same date, with a streak counter.

WORKSHOP
Cogs buy six rig upgrades with five levels each: the drill, the tank, the hold, the hull, the radar and a gas fan. Every purchase asks for confirmation and shows the exact price and what changes. Fuel and repairs at the Outpost cost nothing. Cogs are a game reward only and cannot be bought. The Ore Book lists every ore you have sold.

STATS
Your rank grows as you collect stars. Five badges and a set of personal records are tracked, and one switch turns vibration on or off.

BUILT FOR COMFORT
Large text, large buttons and strong contrast. The game is portrait only and the world fills the whole screen.

The game works fully offline. There are no advertisements, purchases or accounts, and no data is collected.