Encounter map
Where to find Mega Satan
Set encounterThis fight is reached on the Chest route. It is a set encounter, so it does not appear in the random floor boss pools.
See the Mega Satan routeFight guide · Chest / Dark Room
How to fight Mega Satan
A gated ending fight with hands, several waves of summoned bosses, and a final skull phase.
Before entering
Bring both Key Pieces to open the golden door on the Chest or Dark Room route.
- 1
Opening
Watch for: Mega Satan attacks from the top of the room while its hands add pressure.
Try: Keep enough distance to read the incoming projectiles and the hands' movement.
- 2
Summoned waves
Watch for: The battle pauses for groups of Horsemen, sins, and fallen angels.
Try: Clear each wave before expecting the main target to return; do not spend every defensive resource on the opening.
- 3
Skull phase
Watch for: The final form drops the hands and summons but increases projectile pressure.
Try: Refocus on open lanes in the lower arena and finish the last health bar.
Completion mark
Mega Satan character rewards
Defeating Mega Satan records the Mega Satan mark for the character you are playing. Check the clear level beside each reward. Some require Hard mode. The reviewed list has 2 direct reward entries tied to this completion target. These are achievement unlocks, not items dropped by the boss.
Browse all 2 direct rewardsMulti-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
- 3000
- Stage HP scaling value
- 0
- Entity ID and variant
- 274.0
- 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 Mega Satan versus-screen portrait comes from the supplied game art. The original filenames are retained below.
- Portrait file
- Portrait_274.0_MegaSatan.png
- Boss-name image file
- BossName_274.0_MegaSatan.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.