Rocks

Obstacles

Rocks

Poops

Fire Places

Cobwebs

TNT

Spikes

Blocks

Buttons

Dirt Patches

• Blocks movement and projectiles.
• Can be destroyed with explosions and certain items like the Notched Axe, The Nail, Leo, or Thunder Thighs.
• 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 Rock 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. Only one tinted rock can spawn per room.

• Destroying 10 Tinted Rocks will unlock Mr. Mega.
• Destroying 100 Tinted Rocks will unlock The Small Rock.

Found in: Every Stage

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

• Soul Hearts
• Keys
• Bombs
• Locked Chests (only one)
• A combination of any of the items mentioned above
• The Small Rock (after it is unlocked)
  • Not picking up The Small Rock right after it spawned doesn't prevent other tinted rocks from spawning it again. Even though the chances are very small, you can exploit this to obtain multiple Small Rocks.

Super Special Rocks

Super Special Rocks are Tinted Rock variants that 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, with the exception that a single chest or the Small Rock appear without extra rewards.

Super Special Rocks are unlocked by Get a 5-win streak, using a different character for each win

Only one super special rock can spawn in a room and it can't spawn in the same room with a regular tinted rock.

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 Cathedral

Shop Arcade

??? (visual appearance of blue Polyps) Angel Room

Urns have a chance to spawn the following when destroyed:

• 1-3 Spiders
• A few Pennies
• A Quarter
• Swallowed 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 Cap
• Magic Mushroom
• Mini Mush

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 Baby
• Ghost Baby

Notes

• Prior to Booster Pack #5, skulls had a chance of spawning Mushrooms instead of Hosts.

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 Clot
• Placenta
• Umbilical Cord
• Harlequin Baby
• 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.