Prison: treasure, fishing and farming
Player guide
Treasure chests
Each block you mine by hand has a 1 in 20,000 chance to become a treasure chest (sure after 40,000 blocks without one). Only you can open it: click it, or it opens by itself after 60 seconds. It always pays 3 minutes of mining in Gems. Of 100 chests, 25 also give 500 Upgrade Points (UP), 10 a Mining Booster (+10% for 10 minutes), 4 an upgrade book and 1 a crate key.
Geodes
A mine that players were just mining hides a geode (an amethyst block) when it refills, and the refill message says so. The first player to mine it by hand gets 45 seconds of mining and 150 UP. You can mine up to 6 geodes an hour. Chests and geodes pay by the lower of your rank and the mine's rank.
Fishing
Get a free unbreakable rod from Fishing in the Prison Menu or /fishing. Fish at the docks or in island water. Each catch is a common fish (70%, worth 4 seconds of mining, or 222 Gems at A to E), a tropical fish or pufferfish (18%, 12 seconds), a Gem pouch (6%, 30 seconds), 300 UP (4%), a trophy fish (1.5%, 60 seconds) or a rare crate key (0.5%). After 60 catches a day you catch only common fish, worth 25%, until midnight Pacific time. Fishing menu upgrades give a shorter wait (Lure) and more treasure (Luck). Sell fish with /sell, and a trophy fish with Sell this trophy fish or on the Market.
Island farming
Your island opens at rank P or after any prestige. Open Your Island or type /island. Grow wheat, carrots, potatoes, beetroot, melon slices, pumpkins, sugar cane or cactus, then press Sell crops. Farming pays 40% as much as mining. Each day you can sell crops worth up to 20 minutes of mining, plus 5 for each Green Thumb level. Its 3 levels cost 30, 60 and 120 minutes of mining.