Grave Room

Grave Rooms are rooms added in Afterbirth+'s Booster Pack #5 which only appear in the Dark Room. Grave Rooms are part of The Forgotten's unlock quest.

Grave Rooms usually contain a single dirt patch, but after unlocking The Forgotten, they can contain multiple dirt patches, objects, and even some monsters.

Rooms

Before unlocking The Forgotten

• A single dirt patch in the middle of the room, nothing else.

After unlocking The Forgotten

• 4 dirt patches.
• 3 dirt patches and 3 Black Bonys.
• 4 dirt patches and 4 Wizoobs.
• 2 dirt patches and 2 Lil' Haunts.
• 2 dirt patches and an item pedestal with We Need to Go Deeper! on it surrounded by key blocks. (slightly rarer)
• A single dirt patch, an item pedestal with We Need to Go Deeper! on it, and two fireplaces. (very rare)

Unlockable achievements

• 

  The Forgotten - It's complicated.

• 

  Bone Heart - It's complicated.

Gallery

• 

  A Grave Room found in the Dark Room containing a single dirt patch.

• 

  The same room, but after the dirt patch was opened with Mom's Shovel.

Booster Packs
#1	HairpinFully recharges Isaac's active item upon entering a boss fight. Wooden CrossGrants a Holy Mantle shield upon entering a new floor, which protects against one hit of damage. Butter!Using an active item will drop it onto a pedestal on the ground. Taking damage may result in dropping a passive item. Huge GrowthMakes Isaac large for the current room, increasing his range and damage. Ancient RecallSpawns 3 random cards. Era WalkFor the current room, enemies are slowed, Isaac's speed is increased, and his shot speed is decreased.
#2	Filigree FeatherAngels drop items instead of key pieces when defeated.
#3	Door StopThe last door Isaac went through stays open, allowing him to leave the room even if enemies are in it.
#4	Extension CordBeams of yellow electricity flow between Isaac and his familiars, damaging any enemies between them.
#5	Rotten PennySpawns a blue fly every time a coin is picked up. Baby-BenderGrants Isaac's familiars homing shots. Finger BoneGrants a chance to gain a bone heart upon taking damage.