The Mines are the second floor of the alternate path added in Repentance. This stage can be accessed by using 2 bombs to open the boarded up door that appears after defeating the boss of Caves/ Catacombs/ Flooded Caves I or II, or Downpour/ Dross II. The alternative floor of the Mines is the Ashpit, unlocked after beating every single boss from the Mines.
The Mines are significantly more difficult than their standard counterparts, filled with stone and fire-themed enemies that boast greater health, aggression and occasionally resistances to damage. Most obstacles are rocks or spiked rocks, while poops are almost non-existent. Tinted rocks have a high chance of spawning Tinted Rock Spiders. Travelling through it is only advised if you have already acquired Knife Piece 1 in Downpour and intend to access Corpse, however, you will still be presented with an additional, blind option in the item rooms.
After defeating the floor's boss, a door leading to the next alternate chapter - Mausoleum - appears. It requires 2 full hearts to open. The damage taken ignores almost every form of damage reduction, including The Wafer and invincibility. Unlike other methods of health donation, red hearts will not be prioritized over more valuable hearts.
- Minecarts - Several rooms contain rail tracks with minecarts racing around on them, usually containing enemies or hazards. These enemies can be defeated as normal, and doing so will destroy the minecart.
- Throwable Bombs - Occasionally, you can find Bomb Grimaces that will infinitely produce pink, throwable bombs. Walking into one will cause Isaac to pick it up, lighting the fuse, and giving a short time window to rid of the explosive by pressing any of the fire buttons.
- Dark rooms - Some rooms are very dark, like a more potent Curse of Darkness effect, leaving only a small aura of light around Isaac.
Acquiring the Knife Piece 2
If you have Knife Piece 1, a special double-sized room will spawn in Mines II containing a minecart and a broken length of rail track leading to a boarded up door, just like those that lead to a Bedroom. Behind this door lies the area in which Knife Piece 2 can be acquired. There are two methods for accessing this area:
- If you have flight and 2 bombs, you can simply fly over to the boarded up door and blow it open.
- Otherwise, you can repair the track. There are three yellow buttons spread throughout the floor. One will be in the same room as the broken rail track, but the other two are randomly placed. Once all three buttons are pressed, the rail track will be repaired and you can touch the minecart to access the area.
Upon entering this area, all passive and active items will be rendered inactive, and your bombs, coins, and keys will be set to zero. New pickups can still be obtained, however, and will persist after Isaac leaves the area. You will pass through several empty rooms before reaching a room with the Knife Piece 2. Once you pick it up, Mother's Shadow will spawn and your race back to the entrance begins. This enemy cannot be defeated by any means, and escape is your only option.
Unlike your initial trip to reach the Knife Piece 2, the path back will be obstructed by rocks and poops. While flying characters can handle all of this with ease, walking characters will have a significantly harder time. Using your tears and the conveniently-located throwable bombs, you will need to break through the obstructions, press buttons, and grab keys for key blocks to make it back to the main dungeon. Making it out taking little or no damage is possible, particularly if you are fast and accustomed to dodging the shadow's attacks. Once you escape, all your items will be reactivated, and the shadow will end its pursuit.
- It is possible for the floor's crawl space to appear on your escape path. Upon entry, your items will temporarily be reactivated, and you will be able to pick up any items/consumables available. Items will become inactive again after exiting. Mother's Shadow will still appear in the crawl space, and the enclosed area makes the dodging of her attacks very difficult.
||818.0||Slowly crawls around the room. If it sees Isaac, it crawls at him, trying to deal contact damage. Turns into a Spider upon death. Turns into a Coal Spider if it touches fire.|
||818.2||Quickly crawls around the room. If it sees Isaac, it crawls at him, trying to deal contact damage. Turns into a hot coal upon death that blocks shots and deals contact damage, but can be destroyed.|
|Tinted Rock Spider
||818.1||Quickly crawls around the room. If it sees Isaac, it crawls at him, trying to deal contact damage. Turns into a Soul Heart upon death. Can only spawn by breaking tinted rocks on Mines or Ashpit.|
||819.0||Flies toward Isaac, circling around him as it does. Turn into a tiny bomb upon death.|
||820.0||Walks toward Isaac and spits chaotic bursts of rocks at him, some of which may be Rock Spiders.|
||820.1||Walks toward Isaac and spits hot coals at him, some of which may be Coal Spiders.|
||821.0||Slowly wanders around and occasionally shoots Fly Bombs at Isaac.|
||822.0||Wanders around the room, avoiding Isaac. If Isaac stays close to one for long enough, it inflates and starts chasing him, gaining a chance to deflect shots and causing it to explode into lingering blood shots on death.|
||302.0||Chases Isaac and blocks tears, but does not deal contact damage. Temporarily pauses in exhaustion after a certain amount of time. Invulnerable; dies when the room is cleared.|
||823.0||Walks slowly toward Isaac, occasionally attempting to jump on Isaac, shooting out 8 rock shots when it hits the ground and causing rocks to fall from the ceiling.|
||824.0||Rolls around like a wheel. Charges at Isaac when he is in line of sight, bouncing off of walls and obstacles as it does.|
||824.1||Rolls around like a wheel. Charges at Isaac when he is in line of sight, bouncing off of walls and obstacles and creating fires behind itself as it does.|
||825.0||Pops out of the ground in random locations and fires one flame at Isaac.|
||217.0||Slowly dashes in random directions, dealing contact damage.|
||826.0||Dashes toward Isaac and deals contact damage creating rock projectiles when it hits a wall/obstacle. It spawns more rock projectiles the more times it crashes into obstacles, dying after doing so a third time.|
||87.0||Walks towards Isaac, firing Ipecac shots at him. Can turn into a Splasher upon death.|
||827.0||Wanders around the room, rarely firing a radial burst of six shots. Chases Isaac and fires shots more frequently after taking damage.|
||829.0||Burrows towards Isaac and jumps out the ground to fire 3 blood shots at him.|
||61.3||Flies slowly towards Isaac. Fires four tar shots in the ordinal directions and leaves a puddle of slowing black creep upon death.|
||869.0||Crawls around the room erratically, following Isaac and dealing contact damage. Can jump small distances. Releases multiple Troll Bombs upon death.|
||240.1||Slowly crawls along walls to try to line up with Isaac and shoots a stream of shots seemingly affected by Soy Milk.|
||218.0||Moves around the room like Guts, damaging Isaac by contact. Cannot be destroyed.|
||238.0||Walks aimlessly around the room, firing Ipecac shots in random directions.|
||39.2||Randomly wanders around the room. Pauses to fire a Charger that deals one heart of damage when Isaac gets in its line of sight. The Charger is invulnerable, blocks Isaac's tears, has limited range, and flies back to the Chubber.|
||61.5||Flies in erratic, angled movements toward Isaac if his active item has charges. Drains active item charges instead of dealing damage.|
||25.3.0||Flies around the room diagonally, dealing contact damage. Upon death, creates four lines of fire in the cardinal directions.|
|Dragon Fly X
||25.3.1||Flies around the room diagonally, dealing contact damage. Upon death, creates four lines of fire in the ordinal directions.|
||27.3||Stationary enemy that is normally invulnerable. Raises its head up when Isaac gets close, revealing a fleshy stem that can be damaged. Shortly after raising its head, it slams its head down and fires a rock wave towards Isaac.|
||303.0||Slowly hops towards Isaac, occasionally spawning a Dark Ball. Spawns a Sack upon death.|
||840.0||Hops around the room, leaving damaging red creep wherever it lands. Upon death, its associated Brainless Knight dies with it.|
||226.2||Slowly walks towards Isaac, but increases in speed as they take damage. Constantly passively takes damage.|
||227.0||Wanders around the room and throws a bone at Isaac when he is in sight.|
||277.0||Wanders around the room and throws three bones in a row at Isaac when he is in sight. Explodes upon death.|
||42.0||Stationary and invulnerable monster that occasionally fires a blood shot at Isaac. Stops firing when room is cleared.|
||42.1||Stationary and invulnerable monster that occasionally fires an Ipecac shot at Isaac. Stops firing when room is cleared.|
|Constant Stone Shooter
||202.0||Stationary and invulnerable monster that continuously fires shots in a single direction.|
|Cross Stone Shooter
||202.10||Stationary and invulnerable monster that continuously fires shots in four directions, alternating between cardinal and ordinal.|
||809.0||Stationary and invulnerable monster that keeps a single Throwable Bomb spawned.|
||804.0||Stationary and invulnerable monster that jumps and fires a line of rocks in one direction upon landing.|
||218.0||Moves around the room like Guts, damaging Isaac by contact. Cannot be destroyed.|
|Hornfel||Tuff Twins||Great Gideon||Reap Creep|
- In Antibirth, Mines used to have a different way of unlocking Knife Piece 2. Somewhere on the floor, there used to be a room containing four buttons. In the room, next to each button, was 1 to 4 small pebbles, indicating the order in which to press them. After you pressed the four buttons, the Knife Piece 2 would appear in the center of the room. This also wasn't the last knife piece, as there was a third one you needed to collect on the Mausoleum floor.
- As well as that, Antibirth also featured a music track by Mudeth for the Mines floor.
- Moles will open their eyes if encountered in a dark room, however, this doesn't change their behavior.
|Chapter 1||Chapter 2||Chapter 3||Chapter 4||Optional||Chapter 5||Chapter 6||Endgame|
|The Basement||The Caves||The Depths||The Womb|
|The Cellar||The Catacombs||Necropolis||Utero||???||The Void|
|Burning Basement||Flooded Caves||Dank Depths||Scarred Womb|
|The Basement||The Caves||The Depths||The Womb||Sheol||The Shop||Ultra Greed|
|The Binding of Isaac: Rebirth|
|Achievements||Attributes||Bosses||Cards and Runes||Challenges||Chapters|