Isaac CodexGuides
Practical answers to the questions that come up mid-run.
ITEM IDENTIFICATION
How to identify an Isaac item without its name
Follow one real image from recognition to the item entry, with a color-filter fallback when a photo is not enough.
Read guide
SACRIFICE ROOMS
Sacrifice Room: should you take one more hit?
The next reward, the next danger, and when to step away from the spikes.
Read guideDICE ROOMS
Dice Rooms: what do the 1–6 pips change?
Know what gets rerolled before you step on the die.
Read guide ITEM IDENTIFICATION
Brimstone or Mom's Knife?
One Devil Room, two strong items: check the heart cost, your position in a fight, and what happens if you buy both.
Read guide