The Binding of Isaac: Rebirth

The Binding of Isaac: Rebirth

stackable items mod v2
Brr1  [developer] 7 Feb @ 2:16am
Item Ideas
Apart from the items I have in mind to implement, comment any idea for an object here.
I will try my best to replicate it if I see it as interesting and plausible
Last edited by Brr1; 7 Feb @ 2:16am
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Showing 1-15 of 15 comments
jea03 7 Feb @ 5:49am 
Yesterday i got a run where i had two lumps of coal and was sad to see that they dont stack. My Idea would be to give a bit more range per lump of coal and therefor get more damage the further it goes
Brr1  [developer] 7 Feb @ 6:53am 
Originally posted by jea03:
Yesterday i got a run where i had two lumps of coal and was sad to see that they dont stack. My Idea would be to give a bit more range per lump of coal and therefor get more damage the further it goes
Yeah I think that's a neat way of stacking it
Garfield 8 Feb @ 10:46am 
i would have thought about purgatory to add more cracks on the ground or anything else that makes sense(i am a idiot)
Brr1  [developer] 8 Feb @ 12:12pm 
Originally posted by jea03:
Yesterday i got a run where i had two lumps of coal and was sad to see that they dont stack. My Idea would be to give a bit more range per lump of coal and therefor get more damage the further it goes
I have implemented this on one of the latest updates
jea03 9 Feb @ 12:04pm 
Originally posted by Brr1:
Originally posted by jea03:
Yesterday i got a run where i had two lumps of coal and was sad to see that they dont stack. My Idea would be to give a bit more range per lump of coal and therefor get more damage the further it goes
I have implemented this on one of the latest updates
very cool, thanks:resmile:
Godban 9 Feb @ 12:09pm 
When I get Diplo I often use it on sacred heart. Sad it doesn't stack really. Could it get a mix of effects from spoonbender, godhead or holy shot maybe? Or just give it immaculate heart effect on top since they are related
Khakis 9 Feb @ 5:24pm 
Originally posted by Godban:
When I get Diplo I often use it on sacred heart. Sad it doesn't stack really. Could it get a mix of effects from spoonbender, godhead or holy shot maybe? Or just give it immaculate heart effect on top since they are related

Could make it give a +1.0 damage (to damage formula, not flat like Bozo's 0.10)

Cricket's Head does give a small amount of damage with extra copies, so you're still getting some benefit and it's some proper parity between the two

But adding proper non-flat damage ups is difficult with mods, I think other mods like Fiend Folio have a way of trying to fake the damage formula but it requires having to manually account for every damage multiplier in the game
Last edited by Khakis; 9 Feb @ 5:27pm
Khakis 9 Feb @ 6:15pm 
Here's my suggestions, I could think of a lot more but I don't want this post to be too long

Sacred Heart
+1 damage for each copy, similar to Cricket's Head, and should ideally respect the damage formula if possible so it benefits from Sacred Heart's damage multiplier

(exactly like I mentioned in the other comment above, just putting it here for the sake of it)

Ball of Tar
Increase the chance to shoot slowing tears, and/or increase the size of the trail of tar creep (stacking with Lost Cork)

Black Candle / Pentagram
Should increase the Devil Deal Chance further, but changing deal chance effectively is only really possible with Repentogon.

Edit: I just looked at the wiki and Pentagram's deal chance bonus already stacks with itself, granting 15% instead of 10%. My bad

Bob's Curse
Multiplies the poison damage for each copy

Butt Bombs
Multiplies the damage of the screen-wide effect for each copy

Bogo Bombs / Humbling Bundle
Doubled pickups visually turn into "Pickup Bundles" (the sprite is 3+ bombs/keys/coins/red hearts in a pile, respectively) which give +1 more of that pickup for each copy (ie. 4 copies of Humbling Bundle cause a Key Bundle to give 4 keys)

Bogo Bombs only affects bombs, obviously, but if you have Bogo Bombs and Humbling Bundle then Double Bombs will become Bomb Bundles and give 3 bombs.

This is based on an old mod which adds stacking for Humbling Bundle, but unlike that mod you don't need to make a bunch of sprites for each amount of pickup piles or make new types of pickups; you'd just need to swap the sprite of double pickups with code and check if the player picks them up

Also, if the player suddenly loses its copies of Humbling Bundle/Bogo Bombs, the Pickup Bundles should immediately revert to their Doubled state


Celtic Cross
Double the duration of the shield for each copy (Should it capped to something like 30 seconds for balance? Idk)

Champion Belt
Increase the chance for enemies to become champions by additional 15% for each copy

3 Dollar Bill
With each copy, should give additional tear/item effects for each 2-3 second "cycle" (not sure how the hell you would track this, so maybe don't do this one)

Dead Bird / Bird Cage
Spawns more Dead Birds/Bird Cages when you take damage for each copy

should also make it work with Box of Friends, odd that this is one of the only familiars that DOESN'T stack, which goes against player expectations

Oh yeah, and should make it account for Eve's Birthright, too

♥♥♥♥♥ of Babylon
When the conditions for activation are met, should multiply the provided stats for each copy

The Empress card stacks with itself, why doesn't this?

Fanny Pack
Drops an additional pickup for every copy

Goat Head
Weird one, but... spawns an additional devil item for sale in the Devil Room for each copy (makes it so items can appear in layouts that don't have any items for sale normally, like the red chest rooms)

Eucharist
Spawns an additional angel item for each copy (same way as Goat Head)

Guppy's Collar
Increases the chance to revive to 75% at 2 copies, and caps out at 90% for 3 copies

Could be adjusted for how many copies you need to reach the maximum with diminishing returns, because this is really strong for 2 lucky plays of Crooked Penny. But maybe players would like that?
Last edited by Khakis; 9 Feb @ 6:36pm
Bennie 11 Feb @ 1:59am 
I've fiddled around with some items and noticed that Lost Soul doesn't stack which i find weird.

It could either stack by adding an additional lost soul to protect, or more cool, it could give lost soul 1 free hit for each copy, making it easier to protect.
hweaver888 11 Feb @ 12:52pm 
7 Seals: increases horseman contact damage by 25% per copy MAX 5.
PhotoFinn 14 Feb @ 10:47am 
Treasure Map: With 1 stack, fully exploring the floor (outside of secret rooms) spawns a random chest in the final room you enter. More chests with more stacks.

Blue Map: 20% Chance to double pickups in secret rooms. Chance increases with more stacks.

Aquarius: +25% creep size per stack.

Fire Mind: Bigger fires/more fires when tears explode?

Scatter Bombs: Even MORE tiny bombs (+2 little bombs per stack)

Purgatory: More cracks in the ground spawn.
my reflection because it only give more damage with multiple copies im not realy sure how it would stack though
Kenji 19 Mar @ 10:11am 
Heres some suggestions

Ipecac: Increases damage by +20 per additional copy ;

Magneto: Increases the range of opening chests by 1 tile, increases pull force by 25%;

Eye Drops: Its multiplier stacks;

Charm of The Vampire: Reduces kills needed to heal by 1 (caps at 1 kill per heal);

Money = Power: Increases the damage increase from coins by +25% per copy;

Mr. Mega (Doesn't scale infinitely): Increases bomb damage multiplier to x2.5;

Odd Mushroom (Small) (Doesn't scale indefineatly): Removes the -0.7 damage and the x0.9 damage multiplier;

Guppy's Tail (Doesn't stack indefineatly): Increases the chance for a chest on room clear to 50%;

Ghost Pepper/Bird's Eye: Flame size and damage +25%;

Polyphemus: +2 damage and linear x1.5 multiplier per copy (up to 3 copies);
Last edited by Kenji; 19 Mar @ 10:29am
Geeked 30 May @ 9:12am 
20/20: adds another tear and reduces damage by an additional 5%
Dev 12 Jun @ 9:03pm 
Rock bottom:

1st copy: negates the negative effects of items completely (not just prevent your stats from going down)

2nd copy: makes the negative effects of items be positive effects
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