Digg Everyone diggs straight down, all together in one field. Tap DIGG, Space or Enter as the needle crosses the green: a deep bite and little pressure. Yellow is ordinary; red is a short bite and a pressure spike. The zones move every digg. Greens in a row build a streak: at ×10 every digg goes ten times as deep, and upgrades and cards take it higher. A yellow halves the streak, a red breaks it.
Pressure Every well hides a pocket of oil somewhere below. Pressure climbs with every digg: a green barely moves it, a yellow adds some, a red spikes it, and it climbs faster near the pocket, where oil shows turn up. Strike the pocket for a gusher: the well's depth is cased and its oil sold. Past the danger line any digg can blow out: the well's uncased depth and oil are lost and the rig rests a while. A dry hole with no pocket plays out on its own and is cased. Cased depth is never lost.
Upgrade Spend gold in four groups: Digging, Pressure, Oil & gold and Crew. Every upgrade trades something: read the + and − on each row. Shovel levels change the tool in your hands, from the Rusty spade to the Drill rig. Pick one blade, heavy or light; the relief valve switches on and off.
Cards At depth milestones a card is offered, often early on: pick one of three before your next well. Cards are yours for good; the common ones are plain bonuses while the rare ones come with a price. Every card belongs to a family (Digg, Oil, Nerve or Company): hold three of one family and you earn its set bonus too. Your cards are on the Upgrades tab.
Discover Break through 14 strata toward Earth's center. Each new discovery earns gold and one 2× boost lasting 60 seconds. Boosts are never sold.
Return Your shaft is persistent. Crew works while you are away, up to its offline limit between visits.
Invite “Digg beside me” captures an immutable snapshot. Its image keeps that moment; the invitation opens the game with everyone digging and highlights you. Digger Derby is an independent game, not affiliated with any film, studio or person.
A local iframe is not proof of interactive play inside X. That requires an approved, authorized real-world X test.
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