User:Blcd/RandomTidbits

What?

This page contains random information gathered by reverse engineering that has yet to make it into a relevant page. Feel free to use this information and enhance relevant pages. Please strike-out the relevant text when you do. Also feel free to message me on discord or edit my talk page with any research requests.

Items

Athame/Maw

• Athame is a 15% chance on kill to spawn a blackheart. Maw is a 5% chance on kill to spawn a blackheart. If both proc, the black heart drop percentage is whatever one triggered last.
• The effect can stack (E.g. Athame + Razor Blade). This can cause multiple hearts to spawn if the killing damage from multiple effects all trigger on the same frame. Here is an example showing this behavior with a 100% drop rate. https://www.youtube.com/watch?v=ppXu5A2FvS8.

Dead Eye

Upon missing there is an increasing chance to lose the buff.

• first miss = 20%
• second miss = 33%
• third miss and beyond = 50%

Delirious

Delirious can spawn the following bosses(v193) http://pastebin.com/simKrthQ

D4

D4 rerolling excludes the following items.

Id	Name
10	Halo of Flies
81	Dead Cat
238	Key Piece 1
239	Key Piece 2
258	Missing No.
327	The Polaroid
328	The Negative
376	Restock (only in greed mode)
474	Tonsil

Familiars

Lil' Chest

Upon clearing a room, Lil' Chest has a random chance to spawn a consumable or trinket. The drop chance is seeded, however the drop itself is not seeded.

• Chances without BFFs!
  • 10% for a trinket
  • 25% for a consumable
• Chances with BFFs!
  • 12.5% for a trinket
  • 31.25% for a consumable

Bomb Bag

The bomb bag drops a bomb after a certain number of room clears. Note the room clears is tracked per familiar.

• Without BFFs!
  • floor(roomsCleared / 1.1) > 0 && (floor(roomsCleared / 1.1) & 1) == 0
• With BFFs!
  • floor(roomsCleared / 1.2) > 0 && (floor(roomsCleared / 1.2) & 1) == 0

Pickup Familiars

ID	Name	Normal	BFFS!	Notes
94	Sack of Pennies	cleared > 0 && cleared & 1 == 0	cleared > 0 && (cleared & 1 == 0 || rand() % 3 == 0)
96	Little C.H.A.D.	floor(cleared / 1.1) > 0 && floor(cleared / 1.1) & 1 == 0	floor(cleared / 1.2) > 0 && floor(cleared / 1.2) & 1 == 0
98	The Relic	floor(cleared / 1.11) & 3 == 2	floor(cleared / 1.15) & 3 == 2
131	Bomb Bag	floor(cleared / 1.1) > 0 && floor(cleared / 1.1) & 1 == 0	floor(cleared / 1.2) > 0 && floor(cleared / 1.2) & 1 == 0
266	Juicy Sack	1-2 blue spiders (seeded)	+1 blue spider
271	Mystery Sack	floor(cleared / 1.11) & 3 == 2	floor(cleared / 1.15) & 3 == 2	Drops Hearts, Coins, Keys and Bombs. The drop's type is seeded but the subType is unseeded. The drop function explicitly passes a subtype instead of 0. The ranges are, Hearts = 1-6, Coins = 1-4, Keys = 1-3, Bombs = 1-2.
362	Lil' Chest			See the section above
385	Bumbo	32%	40%	Level 2 Bumbo has a chance to drop a pickup on room clear.
389	Rune Bag	floor(cleared / 1.11) & 3 == 2	floor(cleared / 1.15) & 3 == 2
403	Spider Mod	10%	12.5%(1 in 8)	If the roll succeeds, 2/3 chance to spawn a blue spider, 1/3 chance to spawn a battery.
491	Acid Baby	floor(cleared / 1.1) > 0 && floor(cleared / 1.1) & 1 == 0	floor(cleared / 1.2) > 0 && floor(cleared / 1.2) & 1 == 0
500	Sack of Sacks	floor(cleared / 1.1) > 0 && floor(cleared / 1.1) & 1 == 0	floor(cleared / 1.2) > 0 && floor(cleared / 1.2) & 1 == 0

Room Anti-softlock

This is the feature where doors will open after a set time. The anti-softlock check fires every 2 seconds after being in a room for 30 seconds. These are the door open conditions

• Only works in RoomType.ROOM_DEFAULT
• Doesn't trigger if there is a boss/miniboss in the room or the player has flying
• The remaining enemies must be unable to path to the player (Ignoring poop)
• The remaining enemies must have GridCollisionClass COLLISION_WALL or COLLISION_WALL_EXCEPT_PLAYER