The Binding of Isaac Rebirth Items — Complete Item System, Pools and Best Items

Items ARE The Binding of Isaac. Since Rebirth launched in 2014 the item roster has grown from 341 pickups to 719 (plus 188 trinkets), every one of them drawn from a specific item pool and stacked together through multiplicative synergies to shape a run. If you searched "the binding of isaac rebirth items," what you actually want is not a list of names — it's how this whole system works: the pools, the Quality rating, the Collection page, and which items are actually worth screaming about. That is exactly what this guide covers.

Official resources: Steam store page · Repentance store page · IGN game page · Wikipedia · Official wiki Items page

How Many Items Are in Rebirth (and Repentance)

The number climbs with every expansion, and it doubles as a memory landmark for veteran players:

Patch 1.7.5 for Repentance added 3 more items (the wiki records Repentance as 169 new items → 716 total, then 719 after 1.7.5). Trinkets are counted separately: Rebirth 60 + Afterbirth 29 + Afterbirth+ 38 + Repentance 61 = 188 trinkets. The official wiki's Items page and Trinkets page are the authoritative counts; tboi.com's full item list lets you page through everything in ID order.

Item Categories: Passives, Actives, Trinkets and Consumables

• Passive items: permanent once picked up. Most of the game's build-defining pickups live here, including the "tear replacement" type like Sacred Heart, Brimstone and Mom's Knife that rewrite how you attack entirely.
• Active items: occupy your active slot and run on charges. D6 rerolls pedestals, Yum Heart heals, and most actives only fire a set number of times per charge.
• Trinkets: sit in their own slot, can be dropped at will, and are usually weaker than items — with loud exceptions like Cancer and Gimpy that outclass half the passive pool.
• Consumables: cards, runes, pills and dice shards, used up in a single activation. Don't sleep on them; a good card is often stronger than a random item pedestal.

Repentance also stamped every item with a hidden Quality rating from 0 to 4. Quality is exactly what it sounds like: higher Quality means the item shows up at a lower weight in its pool, so the best stuff is rarer as well as stronger. When your Collection page has three empty slots and they are all Quality 4 items, that is normal, not a bug.

Item Pools: Understanding Where Good Items Actually Come From

Every item belongs to a pool, and the pool decides where it can appear. This is the single most important mechanic in the game, and most "why am I only finding trash" frustration traces back to not understanding it:

One detail newer players miss: curse rooms and demon beggars are their own pools too, and a few otherwise-exclusive items (like Missing Page 2) only appear in those spots. If your collection is missing something and you keep rolling Item Rooms, check which pool it actually belongs to first.

Devil Rooms vs Angel Rooms: Why the Best Loot Lives Here

The classic choice of every run: after a boss fight a door may appear. Do you take the Devil Room, pay your red hearts and grab a powerhouse, or skip it and pray for the Angel Room instead?

• Devil pool: Brimstone (the charge laser), Abaddon (turns all hearts black and grants +1 damage), Mom's Knife (the thrown blade), Spirit of the Night (flight + spectral tears). This is the offensive ceiling of the game.
• Angel pool: Sacred Heart (homing + 2.3x damage), Godhead (halo homing tears, unlocked through The Lost's full mark set), C-Section (auto-charging homing fetus), Revelation (the beam). This is where the late-game gods live.

Repentance buffed the Angel route hard with a wave of new Angel-only items, and the community consensus is that the Angel pool now outclasses the Devil pool overall. But Brimstone is still the single most famous "pick this up and the run is won" item in the genre. Both routes remain perfectly playable; the correct choice depends on your character and what you've already picked up. See the charged shot guide for how the charge weapons from both pools actually work.

Best Items in Repentance (Community Consensus)

For the full breakdown of which items are worth memorizing for quick decisions, the Isaac items cheat sheet is the companion piece to this guide.

The Collection Page and 100% Completion

• Pause → Stats → Collection opens your collection log. Items you've picked up are lit up; ones you've never seen show as ?
• The Collection page is your completion progress. 100% corresponds to the completion achievement of each era: Platinum God (Rebirth) → Real Platinum God (Afterbirth) → 1001% (Afterbirth) → 1,000,000% (Afterbirth+) → Dead God (Repentance).
• To fill gaps efficiently: complete challenges and daily runs first (they unlock items into pools), then use D6 to reroll in the right pool. External tools like tboi.com and platinumgod.co.uk will tell you exactly what you're missing and which pool it comes from.

The full 100% route, every achievement definition, and honest time estimates live in the Platinum God guide and the Dead God guide.

Synergies and Anti-Synergies: How Items Stack

• Damage multiplies, it doesn't add: two +50% damage items are not +100% — they're ×1.5 × 1.5 = ×2.25. This is why stacking multipliers on a single tear type beats spreading effects.
• Tear effects layer onto the same shot: Brimstone + homing + poison + spectral is the classic "pile everything onto the laser" dream build. Each effect applies to the beam.
• Anti-synergy traps: tear-replacement items (Mom's Knife, Tech.0, Dr. Fetus, Ipecac) overwrite charge weapons like Brimstone entirely. If you grab Brimstone and then touch a Mom's Knife pedestal, the laser is gone.
• Charge-item synergies: Tammy's Head fires Brimstone in 10 directions at once, and Lump of Coal adds damage based on travel distance — a Brimstone beam eats the full bonus.
• Economy items change how you survive: soul heart producers like Gimpy turn "getting hit" into income, attack-speed trinkets like Cancer multiply the value of every damage item you already own, and coin engines like Piggy Bank (see the isaac pig guide) fund the shop loop.

How to Read Any Pedestal in Ten Seconds

Here's a decision framework that takes you from "what is this thing" to "should I take it" without opening a wiki mid-run:

1. Pause and check the Collection page: if it's lit, read its effect; if it shows ?, treat it as unknown and check an external tool (tboi.com is the fastest).
2. Quality 3-4 with a positive stat line → take it, no questions asked.
3. Quality 0-1 → only take if it serves a specific build (yes, The Poop is actually useful in a few setups, and Curse of the Tower can win you a run with the right actives).
4. If it replaces your tears and you already have a charge weapon → do not take it unless you know exactly what you're doing.
5. If it generates resources on hit (soul hearts, coins, cards) and you can self-damage → it's an economy engine, treat it as a top-tier pickup.

For Spindown Dice players, item IDs become your second language — the Spindown guide covers the ID -1 reroll mechanic and the hidden items it can reach, which is also one of the fastest ways to fill otherwise unreachable Collection entries.

The Hidden Second System: Item Economy

Once you understand pools, the next layer is economy — items that generate resources instead of raw damage. In Isaac, health and coins are both currencies, and a handful of items mint them from thin air:

• Soul heart generation: Gimpy drops soul/black hearts when you take damage (Luck-scaled, up to 50% at +22 Luck) and half red hearts when enemies die. For characters without red heart containers — Blue Baby, The Lost family — that generation is literally extra max HP.
• Coin generation: Piggy Bank gives +3 coins on pickup and drops 1-2 coins whenever you take damage, which turns self-damage sources (Blood Donation Machine, IV Bag, Sharp Plug) into a printer. The full coin engine, including Money = Power and Keeper synergy, is in the isaac pig guide.
• Shop loops: the Pay To Win trinket forces a Restock Box into every Item Room, so you can buy unlimited rerolls with the coins the economy items above generate. Between Steam Sale (half price), Restock (infinite stock) and Piggy Bank (infinite coins), the shop becomes a build you walk into on purpose. See the Pay To Win guide.
• On-hit retaliation: A Missing Page and Missing Page 2 turn damage into damage — a screenwide 40-damage Necronomicon proc, upgraded to 80 with black hearts. They pair with Gimpy's heart drops to make "getting hit" a positive feedback loop — the fuller guide is A Missing Page and Missing Page 2.

The pattern to internalize: damage items win individual rooms, economy items win entire floors. A run that sustains itself through soul hearts and coins buys more items per floor than a run that just has high damage, which is exactly why the best Isaac players rate economy items far higher than beginners do.

Frequently Asked Questions

How many items are in The Binding of Isaac?

719 items in current Repentance (Rebirth 341 + Afterbirth 95 + Afterbirth+ 110 + Repentance 173), plus 188 trinkets. The count shifts slightly with balance patches, so the official wiki is the authoritative number.

How do item pools work in Isaac?

Every item belongs to a specific pool (Item Room, Boss Room, Shop, Devil, Angel, Secret, Curse Room, Planetarium, etc.), which determines where it can spawn. To farm a specific item you go to its pool and reroll with D6 — the strongest items are concentrated in the Devil and Angel pools.

What is the best item in Isaac?

Sacred Heart and C-Section are the consensus top two for general use in Repentance; Brimstone is the most famous run-winner; Mom's Knife, Tech X and Godhead are in the same elite tier. Exact rankings shift with patches.

What is the difference between Devil Rooms and Angel Rooms?

Devil Rooms cost red hearts and offer aggressive power (Brimstone, Mom's Knife, Abaddon). Angel Rooms only appear if you skip Devil deals and now outclass the Devil pool after Repentance's buffs — Sacred Heart, Godhead and C-Section all live there.

How do I check which items I have collected?

In-game: Pause → Stats → Collection (items show as ? until picked up once). Externally: tboi.com or platinumgod.co.uk track your progress. 100% on the Collection page is what the Dead God achievement checks.

For more guides, builds, and strategies, check out our The Binding Of Isaac Hub.

Related Guides

• Isaac Items Cheat Sheet — tboi.com usage, Quality and Item ID
• Isaac Charged Shot — charge weapons and the best charge items
• Isaac Platinum God — the 100% achievement guide
• Spindown Dice — ItemID -1 conversion
• Binding of Isaac Story — Full Narrative, 23 Endings and Lore

Last updated: August 12, 2026.