Changes: Special Item

Revision as of 17:22, 17 August 2021

Special items are items in the game that are considered stronger than normal by the developers. If the player sees a special item, even if the player has Curse of the Blind, subsequent special items have a chance of being re-rolled rather than being presented to Isaac, decreasing the likelihood of obtaining multiple special items on one run.

The system was removed entirely in Repentance, with the item weight mechanic expanded to compensate.

The list of special items is as follows:
- Brimstone
- D100
- The D6
- Dr. Fetus
- Epic Fetus
- Godhead
- Lil Brimstone
- The Ludovico Technique
- Mom's Knife
- Mutant Spider
- Polyphemus
- Pyromaniac
- Sacred Heart
- Soy Milk
- Stop Watch

Special Item Generation

When Isaac enters a room with an item in it, items are selected out of certain item pools depending upon the current room. Special items have a chance of being re-rolled depending on how many special items have been seen during the run:

Number of Special Items Seen	Re-roll Chance
0	0%
1	50%
2	90%
3	98%
4 or more	99%

Notes

Isaac's The D6 doesn't count as a "seen" special item, as it is directly given to him when the run starts.
Special items given by the D4, the D100, 1-pip Dice Rooms, and 6-pip Dice Rooms count as "seen" special items.
Due to the nature of special items, it can sometimes require hundreds of The D6 rolls for special items that are not in the Treasure Room pool to appear. (Note that with infinite rolls, it is always possible to see a special item as long as it is not already removed from the pools.)

The Binding of Isaac: Rebirth

@@ Line 1: / Line 1: @@
+{{context box|nr}}
-'''Special items''' are [[Item|items]] in the game that are considered stronger than normal by the developers.<br>
-If Isaac sees a Special Item, subsequent Special Items have a chance of being re-rolled rather than being presented to Isaac, decreasing the likelihood of obtaining multiple Special Items on one run.<br>
+{{dlc|nr}}'''Special items''' are [[item]]s in the game that are considered stronger than normal by the developers. If the player sees a special item, even if the player has Curse of the Blind, subsequent special items have a chance of being re-rolled rather than being presented to Isaac, decreasing the likelihood of obtaining multiple special items on one run.
-The current list of special items is as follows:
+The system was removed entirely in Repentance, with the [[Item Pool#Item Weight|item weight]] mechanic expanded to compensate.
-* [[Brimstone]]
-* [[D100]]*
+* The list of special items is as follows:
-* [[The D6]]*
+** {{i|Brimstone}}
-* [[Dr. Fetus]]*
+** {{i|D100}}
-* [[Epic Fetus]]*
+** {{i|The D6}}
-* [[Godhead]]*
+** {{i|Dr. Fetus}}
-* [[Lil' Brimstone]]
+** {{i|Epic Fetus}}
-* [[The Ludovico Technique]]
+** {{i|Godhead}}
-* [[Mom's Knife]]*
+** {{dlc|na}} {{i|Lil Brimstone}}
-* [[Mutant Spider]]
+** {{i|The Ludovico Technique}}
-* [[Polyphemus]]
+** {{i|Mom's Knife}}
-* [[Pyromaniac]]
+** {{i|Mutant Spider}}
-* [[Sacred Heart]]
+** {{i|Polyphemus}}
-* [[Soy Milk]]
+** {{i|Pyromaniac}}
-* [[Stop Watch]]*
+** {{i|Sacred Heart}}
-:''* - unlockable items''
+** {{dlc|na}} {{i|Soy Milk}}
+** {{dlc|na}} {{i|Stop Watch}}
 ==Special Item Generation==
-When you enter a room with an item in it, items are selected out of certain [[Item_Pool|item pools]] depending upon the current room.<br>
+When Isaac enters a room with an item in it, items are selected out of certain [[Item Pool|item pools]] depending upon the current room. Special items have a chance of being re-rolled depending on how many special items have been seen during the run:
-Special items have a chance of being re-rolled depending on how many special items already seen that run.<br>
+{| class="wikitable" style="width:10%;height:100%;text-align: center;"
-This percentage chance is 100% * (1 - 0.5 ^ (number of special items seen)).<br>
+!style="width:5%"|Number of Special Items Seen
-This means, at the start, the game has a 0% chance of re-rolling the special item it generated first, then the chance increases to 50% after that, and subsequent special items seen doubles the chance to 75%, 87.5%, 93.75%, and so on.
+!style="width:5%"|Re-roll Chance
+|-
+| 0
+| 0%
+|-
+| 1
+| 50%
+|-
+| 2
+| 90%
+|-
+| 3
+| 98%
+|-
+| 4 or more
+| 99%
+|-
+|}
 ==Notes==
-* Isaac's D6 doesn't count as a "seen" special item, as it is directly given to him when the run starts.
+* Isaac's {{i|The D6}} doesn't count as a "seen" special item, as it is directly given to him when the run starts.
-* Special items given by D4, D100, or 1- and 6-pip Dice Rooms are items generated  by the game, and thus count as "seen" special items.
+* Special items given by the {{i|D4}}, the {{i|D100}}, 1-pip [[Dice Room]]s, and 6-pip [[Dice Room]]s count as "seen" special items.
+* Due to the nature of special items, it can sometimes require hundreds of {{i|The D6}} rolls for special items that are not in the [[Item Pool#Treasure Room|Treasure Room pool]] to appear. (Note that with infinite rolls, it is always possible to see a special item as long as it is not already removed from the pools.)
-* Since seeing a special item is enough, you have no way to prevent the re-roll chance from increasing, like you could do in the original by not taking special items.
-* Even if a special item will act like a normal item once it has been seen, this may not be a good idea to pick them all, as most of them are heavy tear modifiers and can override other tear items that Isaac has taken without increasing its DPS.
-* Since the re-roll chance rapidly increases to a high percentage, seeing 3-4 special items can be enough to make some special items that aren't in Treasure Room Pool (Godhead, Sacred Heart, Brimstone,..) require hundreds of D6 rolls before appearing.<br>
-** However, these special items will always appear after a certain number of re-rolls, even if the Treasure Room Pool was emptied and [[Breakfast]] starts to appear. In these situations, infinite D6 uses and patience are required.
+{{nav}}
-[[Category:Items]]
 [[Category:Mechanics]]
+[[fr:Objets Spéciaux]]