Gem Miner is a turn-based roguelike mining dive set inside a neon-lit vertical shaft. Each tap digs one adjacent cell deeper into the mine, spending precious energy while revealing dirt, rock, hard rock, traps, springs, ladders, and valuable gems. Deeper rows improve gem rarity but also raise the pressure with tougher terrain and cave-ins. Collect coins, complete run missions, trigger gem chains to stay ahead of cave-ins, and choose one of three random upgrades like Pickaxe +1, Energy +10, RockBreaker, or Magnet to extend each run.