The Binding of Isaac: Rebirth Guides — Runs, Items and Routing

Where the numbers come from. Everything here is either a rule the game states, or a conclusion you can draw from it. Where a page needs an exact figure, we mark it and check it against the game's own data before we call it fact. We do not pass guesses off as testing.

Start here

A run that ends early rarely dies to bad luck. The cause is usually one of three things. A route skipped a useful room, a key went to the wrong door, or a boss was fought at low health. Read the run page and the floor routing page first.

All Binding of Isaac guides

Tier list Best Items in The Binding of Isaac — tier list

The best items ranked for reaching the Chest and Dark Room, with the S to C tiers and the reason each one lands there.

Tier list Best Characters in Binding of Isaac — tier list

Playable characters ranked by starting item, stats and how forgiving they are, with the S to C tiers.

Tier list Best Active Items in Binding of Isaac — tier list

Active items ranked for clearing rooms and beating bosses, from the D6 to the actives worth skipping.

Tier list Best Trinkets in Binding of Isaac — tier list

Trinkets ranked by raw impact, from the plain stat lifts to the held picks with a hidden cost.

Tier list Hardest Bosses in Binding of Isaac — tier list

Bosses ranked from most punishing to mildest, with how to play around each fight and the order you meet them.

Core mechanics How a run works

Floors stacked one above the other. Clear rooms, spend pickups, and find the way down without wasting health.

Getting started Which character to start

Isaac is the plain pick, Magdalene the safe one, and Cain the sharp one. Choose by the mistake you make most.

Items Item synergies basics

Some items multiply into a stronger shot, and others cancel out. Ask if two items change the same thing.

Rooms Devil deals vs angel rooms

Devil rooms trade heart containers for items. Angel rooms pay out for free, but only if you wait.

Resources Keys, bombs and pickups

Each resource unlocks a different part of the game. Spend the last of one and a door stays shut.

Combat Boss patterns

Bosses telegraph every attack before it lands. Read the tell, dodge the burst, and punish the lull.

Map Floor routing

The order you clear a floor decides how much health you keep. Take the item, skip the trap, end at the boss.

Secrets Secret rooms guide

A floor hides rooms behind solid-looking walls. Learn the spots to bomb and how to spot a gap.

Items Trinkets and consumables

Trinkets are held, while cards and pills are spent once. Timing is what makes them worth carrying.

Items Transformations guide

Collect a matching set of items and a bonus turns on. Even a partial set keeps its individual pieces.

Modes Greed mode basics

One arena, waves of enemies, and a shop beside you. Money earned in waves becomes the run itself.

Progression Unlocking progression

Boss kills and first-time feats unlock items, characters and paths that feed every later run.

Combat Damage vs tears

Damage times tear rate is your rough output. Raising both beats pumping either one alone.

Mistakes Common Isaac mistakes

Most lost runs die to a short list of habits. None of them feel wrong while you are doing them.

Updates Repentance changes

A wide balance pass reworked items and added new characters and paths. Older advice can be version specific.

Tools

Reference Item index

Notable passive and active items with plain-language effects, sorted for quick scanning during a run.

What this hub does not cover yet

Two things are missing on purpose: exact item numbers and per-boss move lists. Both need figures we cannot yet stand behind, so we publish them only after a data pass.

Found something wrong? Tell us. Corrections are the fastest way this hub improves.