Mine, furnace and diamonds
There is a mine beneath your bunker. Seven ever-deeper rooms, ever-rarer ores and one way to reach the bottom: patience, ingenuity and a good pickaxe.
Mine, smelt, forge
Mine the rock in each room for stone, coal, copper, iron, quartz, silver, gold and obsidian. Take the ore to the furnace to turn it into ingots and forge better pickaxes, a helmet, armour and a lamp. Each pickaxe unlocks new ores.
Lab and blocked tunnels
In the lab you research with the minerals you find: better furnaces, steel, crystal and new weapons. The deepest rooms are sealed behind rockfalls: clearing a tunnel takes hard-to-find resources and a lot of time.
Diamonds: the booster
Diamonds are rare and are found by mining, in missions, in the weekly streak and on expeditions; you can also get them in the warehouse. Each one divides the time left on any job by ten.