Book of Revelations

Lore & Background

The Book of Revelations is whispered to be a torn fragment of the original Apocalypse of John, ripped from the celestial scroll and buried in the rotting floorboards of Isaac's subconscious. Its pages don't just tell the future—they bleed it. When spoken aloud, the words unspool into the Four Horsemen: War, who rides a red steed and carries a greatsword; Famine, whose mount is black and whose touch withers; Pestilence, astride a pale horse, dripping with sores and flies; and Death, who follows on a sickly green nag, scythe gleaming. In Isaac's world, this tome is a desperate prayer—a way to weaponize the chaos that surrounds him, turning the basement's own madness into a brief, brutal ally.

In Their Own Story

In a room choked with cobwebs and the skitter of unseen things, Isaac presses the Book of Revelations to his chest. The leather is warm, almost alive. He mutters the first verse, and the candlelight snuffs out. The shadows on the wall congeal, stretching into the shape of a rider—a figure of bone and rusted armor atop a horse with eyes like hot coals. The Horseman of Pestilence snorts, and a wave of green miasma rolls across the floor, dissolving a cluster of leaping spiders into steaming puddles. Isaac watches, breath held, knowing that every page turned pulls him deeper into the story that is both his salvation and his sentence.

Reader's Guide

The Book of Revelations is an activated item that, upon use, grants Isaac a shimmering, golden shield for a few seconds—enough to tank a stray bullet or a boss's claw swipe without flinching. Simultaneously, it tears open a rift in the room, summoning one of the Four Horsemen to fight for you. Each Horseman behaves differently: War charges at the nearest enemy, dealing heavy contact damage; Famine slows enemies in a radius and drains their health; Pestilence leaves a trail of poison clouds that melt groups of foes; Death sweeps across the room with a scythe, hitting everything in its path. The book has a cooldown of six rooms, so use it wisely—pop it in a crowded room to clear space, or save it for a boss fight to turn a losing battle into a slaughter. It pairs beautifully with items like the Battery or 9 Volt, letting you chain summons more frequently. Experienced players treat this book not as a crutch, but as a tactical nuke with a short fuse.

Did You Know?

• The Book of Revelations is one of the few items that can summon a friendly NPC to fight for Isaac—and the Horseman is always one of the four, but which one rides in is a roll of the dice each time.
• Its design is inspired by the biblical Book of Revelation, the final book of the New Testament, but the game's version adds a grimy, occult twist—the eye on the cover is said to blink if you stare long enough.
• In the original Flash game, the Book of Revelations was a common drop, but in later expansions its rarity has fluctuated, making it a more precious find in some runs.