Rocks

Obstacles

Rocks

Poops

Fire Places

Cobwebs

TNT

Spikes

Blocks

Buttons

Dirt Patches

Teleporters

• Blocks movement and projectiles unless the player has flight or spectral tears respectively.
• 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)
• Normal 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 whose smaller marks and lack of discoloration make them much harder to spot. 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.

Only one super special rock can spawn per room, and normal tinted rock cannot appear in the same room.

Super Special Rocks are unlocked by Get a 5-win streak, using a different character for each win 3 win-streak using a different character each time.

Regardless of DLC version, an unlocking streak must be done with unique characters. That means each successful run must be performed with a new character for it to qualify.

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.

Spiked Rocks

Spiked Rocks are variants of normal rocks which hurt Isaac on contact, even if he's flying. They can fill in a 1-block wide gap like ordinary rocks, but the spikes will remain and Isaac will take damage as he steps on them.

Found in:

The Basement The Caves

Dross Mausoleum

Curse Room

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

Notes

• If spiders spawn from destroying an urn after clearing a room, they will disappear if Isaac leaves and re-enters the room.

Mushrooms

• Act like rocks.

Found in:

The Caves The Catacombs

Flooded Caves Mines

Ashpit 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

Mausoleum Gehenna

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.

Marked Skulls

• If A Strange Door is unlocked, a skull marked with a small "x" will appear in The Depths II or XL. When destroyed, it will drop The Fool card.
  • If the player has Little Baggy, it will drop an identified Telepill.

Polyps

Act like rocks.

Found in:

The Womb Utero

Scarred Womb Corpse

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
• Heart pickups

Buckets

Act like rocks.

Found in:

Downpour Dross

Buckets have a chance to spawn the following when destroyed:

• 1-3 Striders
• 1-3 Small Leeches
• The Poop
• Leech

Notes

• A Bucket that has water in it and is blown up/thrown by a Polty will cause a geyser of water that can hurt Isaac.
• If a bucket would normally spawn striders, but is not on downpour, normal Spiders will spawn instead.
  • This can only occur if Isaac destroys the buckets that usually spawn in the locked room that allows the player to go down to downpour.

Fool's Gold Rocks

Act like rocks.

Fool's Gold Rocks have a chance to spawn the following when destroyed:

• 2-4 Pennies

Unlocked by Defeat Mega Satan as Tainted Lilith

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.