Encounter map
Where to find The Lamb
Set encounterThis fight is reached on the Dark Room route. It is a set encounter, so it does not appear in the random floor boss pools.
See the Dark Room and The Lamb routeFight guide · Dark Room
How to fight The Lamb
The Dark Room boss shifts from a single moving target to a separate attacking head and body.
Before entering
Plan around two targets in the second half. The head continues to pursue you while the body remains in place.
- 1
Opening form
Watch for: The Lamb follows Isaac while firing rings, rotating shots, and homing volleys.
Try: Keep distance so you can recognize the current pattern and move through its gap.
- 2
Head and body
Watch for: At half health the head breaks away and both parts attack independently.
Try: Track the moving head without losing sight of projectiles coming from the stationary body.
- 3
Head attacks
Watch for: The detached head can charge, fire cardinal Brimstone beams, and launch homing shots.
Try: Give the charge a clear path and change position before a beam or homing volley traps you.
Completion mark
The Lamb character rewards
Defeating The Lamb records the The Lamb mark for the character you are playing. Check the clear level beside each reward. Some require Hard mode. The reviewed list has 17 direct reward entries tied to this completion target. These are achievement unlocks, not items dropped by the boss.
Multi-mark and roster-wide achievements appear in the completion tracker.
Game-file referenceRaw data and official artEntity fields, portrait files, and source notes for this boss.
Raw entity values
Health and entity data
- Base HP
- 2000
- Stage HP scaling value
- 0
- Entity ID and variant
- 273.0
- Contact damage field
- 2
These are raw entity fields. Armor, floor scaling, phase transitions, shared health, and scripted waves can make the fight differ from the base HP value.
Asset mapping
Official portrait assets
The The Lamb versus-screen portrait comes from the supplied game art. The original filenames are retained below.
- Portrait file
- Portrait_273.0_TheLamb.png
- Boss-name image file
- BossName_273.0_TheLamb.png
Source notes
How this record is built
Boss identity and portrait metadata come from bossportraits.xml. Random floor membership, weights, and Double Trouble room IDs come from bosspools.xml. Health and entity fields come from entities2.xml. Fixed story locations and route explanations are reviewed editorial context.