Rocks
- 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 Womb,
Utero, and
Scarred Womb 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.
Multiple tinted rocks can spawn in one room by using
XVI - The Tower?
Found in: Every Stage
Tinted Rocks have a chance to spawn 1-3 of the following when destroyed:
-
Soul Hearts
-
Keys
-
Bombs
-
Locked Chests (only one)
Red Chests (only one)
Chests (only one)
Tinted Rock Spiders (
Mines and
Ashpit only)
- A combination of any of the items mentioned above
The Small Rock (after it has been 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, this can be exploited 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 rocks cannot appear in the same room.
In Chapter 4 and Chapter 4.5, Super Special Rocks are almost identical to Tinted Rocks, making them easier to spot in these chapters.
Super Special Rocks are unlocked by the achievement 5 Nights at Mom's, which requires getting a 5-win streak, using a different character each time.
This number can be reduced to 3; see the Notes section of the Achievements page.
Bomb Rocks
Act like rocks.
Found in: Small chance of replacing any rock on any chapter. Some room layouts have predetermined bomb rocks. They are like regular rocks, but explode when destroyed.
Destroying a bomb rock next to a hole does not create a bridge.
Destroying a bomb rock next to a hole can create bridges.
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. If they are located in a room with Pressure Plates, after all the plates are pressed, the spikes will retract into the interiors of the rock. If a Crawl Space is generated with the same rock used to fill a gap, the bridge will not be spiked.
Flat File will remove the spikes from the rocks.
If spiked rocks are crushed by being Stompy, having
Leo or
Thunder Thighs, or using
The Nail, they do not always deal damage, depending on Isaac's speed, size, and the angle they are touched from.
Found in: Every stage except for Chapter 6, ??? and
Home. Additionally, some layouts of
Curse Rooms,
Super Secret Rooms, and
Boss Rush have spiked rocks.
Notes
- If a Spiked Rock is used to fill in a gap, stepping on the created spiked path will deal a full heart of damage. This damage is considered self-damage (it will not affect Angel/Devil Deal chances and items such as
Paschal Candle). Touching Spiked Rocks, however, will not count as self-damage.
Fool's Gold Rocks 
Act like rocks. They have a small chance of replacing normal rocks, sometimes in small clusters, once unlocked.
- Unlocked by:
Defeat
Mega Satan as
Tainted Lilith
Fool's Gold Rocks will spawn the following when destroyed:
- 2-4
Pennies
Urns
Act like rocks.
Found in:
When urns are destroyed, the following events can occur:
- Nothing (68.00%)
- One random coin spawns (4.84%)
- Two random coins spawn (4.84%)
Swallowed Penny spawns (2.50%)
A Quarter spawns (0.50%)
- One spider spawns (9.67%)
- Two spiders spawn (9.67%)
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:
When mushrooms are destroyed, the following events can occur:
- Nothing (68.00%)
- One Pill spawns (9.67%)
Liberty Cap spawns (2.50%)
Magic Mushroom spawns (0.33%) /
Mini Mush spawns (0.25%)
- Only one of each collectible will drop per run. However, it is possible to get both collectibles in the same run.
There is a 2.72% chance for a mushroom in a Secret Room to drop
Wavy Cap instead of a Magic Mushroom or Mini Mush. Only one will drop per run.
- One poisonous gas effect spawns (19.33%)
- This effect knocks Isaac back and deals half a heart of damage. (It does not count as an explosion.)
Skulls
Act like rocks.
Found in:
When skulls are destroyed, the following events can occur:
- Nothing (68.00%)
- One random card / rune spawns (9.67%)
- One
Black Heart spawns (2.50%)
Dry Baby /
Ghost Baby spawns (0.25% chance each)
- Only one of each collectible will drop per run. However, it is possible to get both collectibles in the same run.
- One
Host enemy spawns (19.33%)
Notes
Prior to Booster Pack #5, skulls had a chance of spawning
Mushrooms instead of
Hosts.
Marked Skulls 
Act like rocks.
- Unlocked by:
Defeat
Mother
Once unlocked, a single skull marked with a small "x" will appear in Depths,
Necropolis, and
Dank Depths II or XL. When destroyed, it will drop
0 - The Fool.
- If Isaac has
Little Baggy, it will drop an identified Telepill. If Isaac also has
False PHD, it will drop an identified ??? pill.
Notes
- Cannot be re-rolled by
D12.
- Marked Skulls may spawn in
Red Rooms on
Depths,
Necropolis, and
Dank Depths, even while not in the II or XL floor. They can also appear in Red Rooms in
The Void based on rooms from those floors.
- Marked Skulls have different appearances when spawned on other floors, e.g. manually via the console or during the DELETE THIS challenge. Some of these are Cut Content from the original game.
Polyps
Act like rocks.
Found in:
When polyps are destroyed, the following events can occur:
- Nothing (68.00%)
- Random heart spawns (9.67%)
Umbilical Cord spawns (2.50%)
Blood Clot /
Placenta spawns (0.25% chance each)
- Only one of each collectible is encounterable per run. However, it is possible to get both collectibles in the same run.
- A ring of 6 red projectiles and a puddle of red creep (19.33%)
When polyps in the Corpse are destroyed, the following events can occur:
- Nothing (68.00%)
Rotten Heart spawns (9.67%)
Lil Larva spawns (2.50%)
Rotten Baby or
Rotten Meat spawns (0.25% chance each)
- Only one of each collectible is encounterable per run. However, it is possible to get both collectibles in the same run.
- Launches 6
Small Maggots in all directions and a puddle of green creep (19.33%)
Buckets 
Act like rocks.
Found in:
When buckets in Downpour are destroyed, the following events can occur:
- Nothing (68.00%)
- One random coin spawns (4.84%)
- Two random coins spawn (4.84%)
Swallowed Penny spawns (2.50%)
Leech spawns (0.50%)
- One
Strider spawns (4.83%)
- Two
Striders spawn (4.83%)
- One
Small Leech spawns (4.83%)
- Two
Small Leechs spawns (4.83%)
When buckets in Dross are destroyed, the following events can occur:
- Nothing (68.00%)
- One random coin spawns (4.84%)
- Two random coins spawn (4.84%)
Butt Penny spawns (2.50%)
The Poop spawns (0.50%)
- One
Drip spawns (4.83%)
- Two
Drips spawn (4.83%)
- One
Small Leech spawns (4.83%)
- Two
Small Leechs spawns (4.83%)
In addition to these rewards, whenever a full bucket (i.e. filled with water or filled with poop) is destroyed or picked up by a Polty, 6 projectiles will always spawn in a small radius.
Notes
- If a bucket would normally spawn Striders, but is in a dry room, normal Spiders will spawn instead.
Notes
- All item and trinket drops from rocks can only spawn once per run, and copies cannot spawn if Isaac has already previously collected the item/trinket on the run.
Unlockable Achievements
- Lucky Rock - Destroy 100 rocks.
- Mr. Mega - Destroy 10 Tinted Rocks.
- A Small Rock - Destroy 100 Tinted Rocks.
5 Nights at Mom's - Get a 5-win streak, using a different character each time (
this number can be reduced to 3, see the notes section).
Gallery
References
![]() ![]() |
---|
![]() ![]() | |||
---|---|---|---|
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() ![]() ![]() ![]() ![]() ![]() |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![]() ![]() |
---|