Binding of Isaac: Rebirth Items — The Complete Item Guide and Cheat Sheet
Binding of Isaac items explained: item pools, rarity tiers, the best items in Repentance (Brimstone, Sacred Heart, etc.), how item synergies work, and the item collection journal.
Isaac Items Guide — Item Tiers, Pools, and the Best Items in Repentance
Items are the entire game — The Binding of Isaac has 700+ items (in Repentance), each drawn from specific item pools, combining into the synergies that make every run unique. If you're searching "isaac items," you want the system explained: pools, rarity, the best items, and how synergies work. Here's the complete guide.
The Item System in One Minute
- What they are: passive and active items that change your tears, stats, and abilities — the game's entire power progression
- How you get them: item rooms, boss rooms, shops, devil/angel deals, chests, and hundreds of gated sources
- The count: 700+ items in Repentance (the final expansion) — the collection journal tracks them all
- The magic: synergies — items combine multiplicatively; the game's depth is discovering/abusing combos
Item Pools (How Rarity Really Works)
Items aren't just "rare" — they come from pools that determine what can appear where:
| Pool | Where you find it | Examples |
|---|---|---|
| Treasure Room | The standard item room | The "normal" pool — most common items |
| Boss Room | After boss fights | Stronger items |
| Shop | The shop | Utility/expensive items |
| Devil / Angel | Deal rooms (after boss, with soul hearts) | The power pool — Brimstone, Sacred Heart, etc. |
| Secret / Greed / special pools | Hidden rooms, Greed Mode, special sources | Niche/rare items |
The devil/angel rule: the game's strongest items (Brimstone, the mega-damage ups) live in the devil/angel deal pools — that's why "should I take the devil deal?" is the game's most-debated question.
The Best Items (Community Consensus, Repentance)
| Item | What it does | Why it's top-tier |
|---|---|---|
| Brimstone | Charge a giant piercing laser | The game's most famous run-winner — see the charged shot guide |
| Sacred Heart | Huge damage + homing + HP up | The best "generic" item — massive damage with homing |
| C-Section | Fetal tears that orbit and slam enemies | Repentance's strongest tear-replacer |
| Mom's Knife | Thrown knife, piercing, high DPS | The classic "basically won" item |
| Tech.X | Charge a laser ring | Top-tier charge item (see charged guide) |
Repentance rebalanced the top items — Sacred Heart and C-Section are now commonly ranked above Brimstone by the community (homing + damage + no charge time). But Brimstone's synergy ceiling (beam + piercing + status) keeps it legendary. All three = "run won."
Synergies: How Items Actually Combine
- Damage items stack multiplicatively (each % is a multiplier — 2 × 50% damage items = 2.25×, not 2×)
- Tear modifiers apply to charge weapons (poison/homing/spectral on Brimstone = the classic god-build)
- The anti-synergy trap: tear-replacers (Mom's Knife, Tech.0) override charge weapons — pick your item order carefully
- The discovery loop: the game's joy is finding a combo you've never seen — the community's "broken synergies" threads are the culture
The Collection Journal (Tracking Your Items)
- In-game: the Collection page shows every item, filled as you collect (the "?" entries are the chase)
- Completion %: the game tracks your collection/achievement percentage — hitting 100% is the Dead God/Platinum God goal (see the Platinum God guide)
- External tools: tboi.com and platinumgod.co.uk for "what's left and where it comes from"
Frequently Asked Questions
How many items are in Binding of Isaac?
700+ items in Repentance (the final expansion), tracked in the in-game collection journal. Earlier versions had fewer.
What is the best item in Isaac?
Sacred Heart and C-Section top Repentance-tier lists (damage + homing), with Brimstone the most famous all-arounder. Any of them is a "run-winner."
How do item pools work in Isaac?
Each item belongs to a pool (Treasure, Boss, Shop, Devil/Angel, Secret, etc.) that determines where it can appear. The strongest items live in the devil/angel pools.
What are the rarest items in Isaac?
Items from rare/special pools (the secret pools, Greed-specific items, gated unlocks) — plus the collection-chase items that only appear through specific unlocks.
How do I see what items I have collected?
The in-game Collection journal (with completion %), plus community tools (tboi.com, platinumgod.co.uk) for tracking what's missing.
Related guides: Isaac Charged Shot · Isaac Platinum God · Isaac Platforms
Last updated: August 11, 2026.