Mine floors

Themes

These are the regular themes. Dangerous mines, toggled from floor 120 after Danger in the Deep, replace the monsters and recolor the floors. The ore bands below are the regular mines.

Reward floors

Every multiple of 10 is a reward floor. No enemies spawn, and a chest usually holds one item. Each player can take that item once. It never resets.

Choosing remixed mine rewards at the start can swap some of these chests for another item from that floor's list. Floor 30 stays empty. Floors 40, 70, 100, and 120 keep their normal reward. The table is the normal chest.

Finding a ladder

After a floor loads, there is a 95% chance the game tries to place a ladder on a random open tile. If that ladder lands, rocks on that floor will not drop another. Floors 12, 52, and 92 already have a ladder, and those ladders do not block rock ladders. Floors 12 and 52 still have that ladder when the floor is infested. Floor 19, 59, and 99 are spirals.

Each monster killed over an open tile has a 15% chance to drop a ladder. The ladder buff from the Statue of the Dwarf King adds 7%, for 22%. Monster ladders do not stop rock ladders.

Each rock starts at a 2% chance to drop a ladder. Daily luck can add up to 2.5 percentage points or subtract 2. The Special Charm is 0.5 of those 2.5 points. Each point of luck from food adds 1%. A rock ladder stops further rock ladders on that floor. In the Skull Cavern, 20% of those rock ladders are shafts instead, and finding one does not stop the next rock from dropping another.

Infested, mushroom, and dungeon floors

Infested floors are full of slimes or a mix of monsters, with no rocks. Slime-infested floors cover the walls and ground in green slime. Quartz and mushrooms can still be foraged. Kill every monster, including buried duggies, and a ladder appears on the last kill or beside the entrance. If you ignore a ladder on the kill, another can appear by the entrance later, with the message "A way down has appeared." A rare infested floor has no monsters, and the ladder shows up by the entrance on its own. Infested floors stay infested all day. They cannot appear on elevator floors (numbers ending in 0 or 5), floors 1–4, 41–44, or 81–84, floors 19, 59, or 99, or floors 31–39, 71–79, or 111–119. Oil of Garlic stops infestations only if you drink it before you enter the floor.

On floors 81–119, except elevator floors, a floor has a 3.5% chance to be a mushroom floor if that same floor has not already been one today. Red and purple mushrooms are thick, rocks and ore nodes are scarce, and the lanterns usually include a green one. The mushroom floor exists only on your first visit that day and is gone when you leave.

After you have entered the Quarry Mine, an eligible mine floor has a 4.4% chance to generate as a dungeon floor. It uses the Quarry Mine's rocks and monsters, it is never infested, and it stays a dungeon floor all day. Dungeon floors skip floor 1 and every elevator floor. They can still appear on several floors where an infestation cannot, including 2–4, 19, and the shadow, castle, and crimson bands, except the elevator floors 35, 75, and 115.

• Elevator stops
• Quarry and the Quarry Mine door