The Binding of Isaac:

Wrath of the Lamb Artwork by Edmund McMillen. Information Distribution

PC/Mac DVD (DRM free) Download (Steam) Flash Game (sometimes laggy) Designers

Edmund McMillen (Artist) Florian Himsl (Programmer) Composer Danny Baranowsky Platforms Mac OS X

Microsoft Windows

Linux

The Binding of Isaac: Wrath of the Lamb is an official DLC expansion to The Binding of Isaac, which adds new Items, Rooms, Enemies, Bosses, and more. The DLC was released on Steam on May 28, 2012 and costs $2.99/£1.99/2.99€.

For pre-release information and beta images, see Wrath of the Lamb (Pre-Release).

For patch version history, please see Wrath of the Lamb/Version History.

Please report bugs to Wrath of the Lamb Bugs and do not post them here.

Challenges

Wrath of the Lamb saw the addition of ten challenges. More details about each challenge and their unlockable items can be found on the Challenges page.

Achievements

47 achievements (originally 24) were added with the Wrath of the Lamb DLC. What they are and their unlock requirements can be found on the Achievements page.

Secrets

34 Secrets were added with the Wrath of the Lamb DLC. What they are and their unlock requirements can be found on the Secrets page.

Floors

The Cellar is an alternative version of The Basement which can randomly replace one or both Basement levels in a playthrough. The enemies differ from those appearing in the Basement, featuring an increase in the number of Spider-themed Enemies. Areas of webbing appear in the terrain which slow Isaac's movement and the speed of tears that pass through. The Cellar's enemies/bosses are arguably harder than that of the Basement's, making it a challenge for newer players.

The Catacombs replaces The Caves in a similar fashion to how The Cellar can replace The Basement. The Catacombs contain tougher enemies than the Caves, such as Keepers and B. Lickers.

Necropolis is an alternative form of The Depths. It generally features harder versions of enemies from The Depths.

Identical in appearance to The Womb, Utero is identified by different enemies, such as Mask + Hearts and Angelic Babies, and different boss types.

With Cathedral-styled walls, Cathedral is the polar opposite of Sheol and is the other option of floor to go after defeating It Lives. It features angel-based monsters (Holy Leech, Angelic Baby) and contains a New Final Boss.

After you finish The Cathedral while holding the Polaroid there is a new floor that starts out with four Golden Chests in the spawn room that always spawn an item. Every room before the New Final Boss are rooms with two bosses (I.E. two Chubs, two Peeps, two different Horsemen of the Apocalypse.) Beating this floor with a specific character unlocks their respective item and a Final Ending Cutscene.

Rooms

See Angel Room for more detail. An alternative to the Devil Room, with an Angelic figure (Presumably God) sitting there instead of Satan. Items do not cost hearts to pick up.

Costs 1 heart total (Half a heart walking in, half a heart walking out) to enter and exit. Has either one or two red chests or, rarely, an item from the Devil Room, Angel Room or Secret Room. The heart cost can be bypassed with flying upgrades so long as Isaac does not touch the spikes on the sides of the doorway. (This only applies on the way in, with the way back out always causing damage with or without flying upgrades.) If a secret room is next to the Curse room, a second spike door will be spawned allowing access between the two.

Contains nothing but a single spike floor tile. Damaging yourself will spawn chests, both locked and unlocked, after walking on the spikes. Flight does not affect these spikes, and Isaac will still take damage. The amount of hits Isaac needs to take before spawning a chest is random. It is possible to use the Book of Shadows to spend no life but make the chest appear. There is also a very rare possibility for the Sacrifice Room to drop Devil Room items, such as Brimstone or The Nail.

A special Challenge Room that always contains a Boss Room item. This room can be identified from the normal Challenge Rooms by the additional skull at the top of the barred door and a bloody sword on the map. You must have only 1 red heart, 1 half red heart, or no red hearts to go inside (Not including Soul Hearts). These rooms are always opened for ???.

This room can be identified from the Book icon on the minimap. The door itself looks identical to that of the Shop. This room gives you 2 books to choose from and requires a key to unlock the door. This room can spawn on every floor. It is also possible to have the same book spawn on both pedestals.

This room can be identified from the normal Secret Room by the unique tune that plays when it is opened and the darker icon on the map. It has something specific inside, which depends on the backdrop of the room.

Monsters

Obstacles

Cobweb - Slows down player as well as projectiles (Can be destroyed by Bombs)

Hellfireplace - An orange version of normal campfires mostly found in the cellar, but occasionally found in other places too. Shoots slow short-ranged projectile at the player.

Golden Poop - Similar to the poop obstacle, it is colored gold and drops at least 5 coins or a Trinket when destroyed.

Corny Poop - Poop with an Eternal Fly orbiting it. when the poop is destroyed, the fly will turn into a larger Attack fly, with increased health.

Bosses and Mini-Bosses

Wrath of the Lamb saw an addition of multiple bosses, many of which being alternates of existing bosses pre-DLC.

An alternative Beggar may occasionally spawn in the place of a normal Beggar. This beggar takes on a more demonic appearance (horns, black skin, red eyes) than his normal counterpart. This demon beggar does not accept money, instead exchanging hearts for items. The items it gives are Deal with the Devil items. Two spiders spawn when the Devil Beggar is blown up.

Removes the map, replacing it with a black room with a question mark in the middle (same as a Secret Room) for the duration of the whole level.

Makes the current level much larger, by creating more rooms to walk between. These levels, which are indicated by the suffix "XL" (ex: Catacombs XL), are effectively two stages combined into one, with two treasure rooms and two linked boss rooms.

If the Cellar/Basement is afflicted with this curse, both treasure rooms will be locked and will require a key.

If this curse happens on The Depths/Necropolis or The Womb/Utero, first boss rooms will play the same music that plays when fighting Mom or Mom's Heart respectively.

It is possible that Super Secret Room will not spawn in an XL level.

Expands the current floor one size category higher (Basement/Cellar 1 would become the size of Caves/Catacombs 1, Caves/Catacombs 1 becomes Depths/Necropolis 1, etc.)

Gallery

Trivia

The origin of the name is from the Book of Revelations, quote 6:16: "They called to the mountains and the rocks, 'Fall on us and hide us from the face of him who sits on the throne and from the wrath of the lamb!'".

Videos

Binding of Isaac Wrath of the Lamb Trailer