Rocks

Obstacles

Rocks

Poops

Fireplaces

Cobwebs

TNT

Spikes

Blocks

Buttons

Dirt Patches

Rocks

• Blocks movement and projectiles.
• Can be destroyed with explosions and certain items like the Notched AxeIsaac holds the axe above his head for as long as the spacebar button is held (or until he leaves the room). While holding the axe, Isaac can break any rock he touches, but cannot attack or pick up other items., The NailAdds one soul heart and allows the breaking of rocks and damaging enemies by simply walking over them. Increases damage and decreases speed. All effects except for the Soul Heart wear off upon leaving the room., LeoAllows you to crush rocks when you walk over them., or Thunder ThighsDestroys rocks upon contact with Isaac. Adds one heart container and lowers Speed..
• Can fill in a 1-block wide gap when pushed in the right direction by an explosion, or with one of the abilities that allows destruction by walking onto the rock.
  • Note: With these items, it is important to walk in the direction of the gap.
• Small chance to reveal a Crawl Space when destroyed.
• Destroying 100 rocks will unlock the Lucky RockEach obstacle destroyed drops one coin. trinket.

Tinted Rocks

Sometimes referred to as "Marked Rocks", they are always marked with an "x", and in some levels slightly tinted/discolored. These rocks are much less noticeable in The Womb and Utero due to them being the same color as the surrounding rocks, but can still be distinguished by the "x" on the bottom right.

• Destroying 10 Tinted Rocks will unlock Mr. MegaGives Isaac 5 bombs, and makes all dropped bombs larger, which have an increased blast radius and increased damage..
• Destroying 100 Tinted Rocks will unlock The Small RockIncreases damage by 1, increases tears by 0.2, and decreases speed by 0.1..

Found in: Every Stage

Tinted Rocks have a chance to spawn 1-2 of the following when destroyed:

• Soul hearts
• Keys
• Bombs
• Golden chests (only one)
• A combination of any of the items mentioned above
• The Small RockIncreases damage by 1, increases tears by 0.2, and decreases speed by 0.1. (after it is unlocked) (Sometimes spawns with additional pickups, but cannot spawn alongside chests.)

Super Special Rocks

Super Special Rocks are Tinted Rock variants which are much harder to spot, as they have a smaller mark and are not discolored. Super Special Rocks take two bombs to blow up, and drop the contents of two Tinted Rocks.

Super Special Rocks are unlocked by: Get a 5-win streak, using a different character for each win5 Nights at Mom's

Bomb Rocks

Act like rocks.

Found in: Low chance of replacing any rock.

Bomb rocks can be found anywhere a normal rock can spawn. They can only be destroyed by explosions and "stompy" items, like normal rocks. When they are destroyed, they create an explosion. Note that destroying a bomb rock next to a hole does not create a bridge as with normal rocks.

Urns

Act like rocks.

Found in:

The Basement The Cellar

Burning Basement The Cathedral

Shop Arcade

Blue Womb (visual appearance of blue Polyps) Angel Room

Urns have a chance to spawn the following when destroyed:

• 1-3 Spiders
• A few coins
• A QuarterAdds 25 to Isaac's coin count, capping at 99.
• Swallowed PennyUpon taking damage, Isaac drops a penny.

Mushrooms

• Act like rocks.

Found in:

The Caves The Catacombs

Flooded Caves Secret Room

Mushrooms have a chance to spawn the following when destroyed:

• Pills
• Poisonous gas, which knocks back Isaac and deals a half-heart damage. (This does not count as an explosion.)
• Liberty CapGrants a chance of triggering Mini Mush, Odd Mushroom (Large), Odd Mushroom (Thin) or The Compass effects for the current room upon entering it.
• Magic MushroomIncreases all stats and enlargens Isaac.
• Mini MushIncreases Speed and Shot Height and decreases Isaac's size, but lowers Range.

Skulls

Act like rocks.

Found in:

The Depths Necropolis

Dank Depths Sheol

Sacrifice Room

Skulls have a chance to spawn the following when destroyed:

• Host enemies
• Tarot cards
• Black hearts
• Runes
• Dry BabySpawns a familiar that follows Isaac around and blocks enemy projectiles. Upon blocking a shot, it has a chance of triggering The Necronomicon effect.
• Ghost BabySpawns a familiar that follows Isaac around and fires spectral tears.

Notes

• Prior to Booster Pack #5, skulls had a chance of spawning Mushroom enemies.

Polyps

Act like rocks.

Found in:

The Womb Utero

Scarred Womb

Polyps have a chance to spawn the following when destroyed:

• 6 red tears in all directions and a puddle of bloody creep
• Blood ClotIncreases damage by 1 and range by 5 for tears fired from the left eye.
• PlacentaGrants a full heart container, and a chance to regenerate a half-heart of health every minute of gameplay.
• Umbilical CordWhen Isaac's health is brought to half a red heart and no soul hearts, a Little Steven familiar spawns for the current room.
• Harlequin BabySpawns a familiar that follows Isaac around and fires two tears at once in a V-pattern.
• Heart Pickups

Unlockable Achievements

• 

  Lucky Rock - Destroy 100 rocks.

• 

  Mystery Gift - Destroy 500 rocks.

• 

  Mr. Mega - Destroy 10 tinted rocks.

• 

  Blue Bomber - Destroy 10 tinted rocks and defeat Mom's Heart 11 times.

• 

  A Small Rock - Destroy 100 tinted rocks.

Gallery

• 

  Rebirth concepts, including Bomb Rocks.