The Isaac Online Beta is now closed until further notice due to datamining of unreleased content. More info here.
#580Red Key"Explore the other side"Active item (4 rooms recharge time)
While heldIndicates walls that can create a Red Room with a red outline.

On useCreates a Red Room when used next to one of the red outlines on walls.

Red Rooms are most commonly same as normal rooms, but with a 10% chance to be any type of special room instead. It can create these types of rooms:
• Angel Room
• Arcade
• Bedroom
• Curse Room
• Devil Room
• Dice Room
• Library
• Mini-Boss Room
• Planetarium
• Sacrifice Room
• Secret Room
• Shop
• Super Secret Room
• Treasure Room
• Vault

Rooms created by Red Key will always be 1x1 rooms with doors available on all sides.

If a door leads Isaac outside of the 13x13 playable area of the floor, it will take Isaac to the I AM ERROR room.

Since Secret Rooms cannot be overwritten by Red Key, the lack of an red outline can be used as an indicator that a Secret Room is possibly located behind the wall.

If a created Red Room is adjacent to the Ultra Secret Room, its entrance will immediately open along with a jingle sound.

Has no effect in Greed Mode and cannot normally be obtained there.

Can be used to open the hidden closet door in the Home level that unlocks the Tainted version for each character. If the character has already been unlocked, this room will contain Inner Child, or a Shopkeeper if not unlocked.

Unlock: Open Mom's Chest in the Home level.

- Tags -- Synergies -- Links -

▾ITEMS ()▾

D infinityDogmaJar of WispsFlipEverything JarFiddle CubeDogboardGhastly Flame


Extra VesselVessel RockDogrock RockSand CastleFractal Geode


HeartHeart (half)Heart (soul)Heart (eternal)Heart (double)Black HeartGold HeartHeart (half soul)Scared HeartBlended HeartBone HeartRotten HeartPennyNickelDimeDouble PennyLucky PennySticky NickelGolden PennyKeyGolden KeyKey RingCharged KeyGolden BombGolden Troll BombGiga BombMega ChestMom's ChestMega BatteryGolden BatteryHalf Black HeartBlended Black HeartHalf Immoral HeartImmoral HeartBlended Immoral HeartMorbid HeartTwo-Thirds Morbid HeartThird Morbid HeartFull Eternal HeartDouble Full Eternal HeartCursed PennyGolden Cursed PennyHaunted PennyHoney PennyLego StudTokenCharged Spicy KeySuper Charged Spicy KeyFirework BatteryVirtuous BatteryBlood SackDire Chest


HagalazJeraEhwazDagazAnsuzPerthroBerkanoAlgizGolden PillGolden Horse PillStorage BatteryCorroded Battery


Slot MachineBlood Donation MachineFortune Telling MachineBeggarDevil BeggarShell GameKey MasterDonation MachineBomb BumShop Restock MachineGreed Donation MachineMom's Dressing TableBattery BumHell GameCrane GameConfessionalRotten BeggarMining MachineBismuth BeggarSourpussUnfinished GolemGeode GolemBabiMidarizerSweetpussBlacksmithZodiac BeggarRobot TellerEvil BeggarFake BeggarDealerCell GameHug BeggarCosplay BeggarPhone BoothGolden Slot MachineJukeboxVending MachinePoker TableGrid Restock MachineRevending MachineVanity StatwheelSewing Machine


MagdaleneSamsonAzazelLilithBethanyTainted MagdaleneTainted EveTainted LilithTainted Bethany


▾OTHER ()▾

Pact of ChampionsPact of FragilityPact of FrostPact of GroundingPact of HemorrhagePact of Ice WraithPact of MasochismPact of MischiefPact of MitosisPact of ParanoiaPact of PerilPact of PunishmentPact of PurgatoryPact of RevivalPact of Scarcity