Prison: milestones and Rank Crates
Current guide — checked 23 September 2026
Milestones
Milestones are lifetime goals. Open Milestones in the Prison Menu, or type /prison milestones. Click a goal you have reached, or Claim all. Each reward is paid once. Counts never go down, even when you prestige. Milestones give Upgrade Points (UP) and crate keys, not Gems.
• Rank Journey: every rank up from B to Z gives a key. B–E give an Inmate key, G–J a Miner key, L–O a Skilled key, Q–T a Foreman key and V–Y a Veteran key. F, K, P and U each give 2 keys (Miner, Skilled, Foreman or Veteran) plus 100, 200, 300 or 400 UP. Z gives 3 Veteran keys and 750 UP.
• Blocks Mined: from 10,000 to 10,000,000 blocks.
• Gems Earned by selling: from 100,000 to 500,000,000 Gems.
• Prestige: prestige levels 1, 3, 5, 10 and 25.
• Pick Mastery: pickaxe levels 3, 5, 7, 9 and 10.
• Explorer: visit 3, 5, 10, 15 and 25 different mines.
• Well Equipped: own a backpack, Auto Pickup, Auto-sell and a Mining Buddy.
Rank Crates
Five crate chests stand in the lobby, from left to right: Inmate, Miner, Skilled, Foreman and Veteran. Hold the matching key and right-click the chest to open it. /keys shows your keys. Keys come only from milestones.
Each crate always gives Gems: Inmate 1,500, Miner 20,000, Skilled 200,000, Foreman 800,000 and Veteran 1,500,000. It also gives one bonus. A bonus can be:
• more Gems
• a Mining Booster: more drops while you mine, +10% to +30% for 10 to 30 minutes
• an upgrade book that adds one level of Big Break, Lucky Find or More Ore to your pickaxe
• a new name color for your pickaxe