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| Pick up two technology items in one runTechnology Zero
Technology Zero is an unlockable passive item added in Booster Pack #2.
- Connects tears with electricity that damages enemies.
- The electricity's damage is equal to Isaac's damage.
- Each of Isaac's tears can connect to other allied tears Including those of shooting familiars.
- The number of connections is limited by the number of Isaac's tears.
- BrimstoneTears are replaced by a laser beam that pierces through all enemies and obstacles in its path and deals high damage. Can only be fired after a short charge-up period.: Overrides Technology Zero.
- Continuum+2.25 Range Up. +1.5 Tear Height. Isaac's tears travel through walls and appear out of the opposite wall. Isaac's tears also travel over rocks and objects.: Electricity that connects tears does not go through walls. Electricity does not reconnect when tears return.
- Cain's Other EyeSpawns a familiar that floats slowly around the room on a zig-zag pattern similar to The Peeper and shoots normal tears in the same direction as Isaac.: Isaac's tears will connect with the tears from this item.
- Dr. FetusTears are replaced by bombs that benefit from bomb-enhancing effects and slide for a fixed time after being fired.: Overrides Technology Zero.
- Epic FetusIsaac's tears are replaced with guided missiles, like those used by the Doctor's Remote.: Overrides Technology Zero.
- HaemolacriaTears are now fired in an arc. Upon hitting the floor, an obstacle, or an enemy, they burst into many smaller tears in all directions. Increases tear delay.: Overrides Technology Zero.
- Mom's KnifeIsaac's tears are replaced by a knife that pierces enemies, can travel through obstacles, and can hurt enemies while Isaac is holding it. Holding down the fire button before firing increases its range and power.: Overrides Technology Zero.
- TechnologyReplaces tears with a piercing laser with unlimited range.: Overrides Technology Zero.
- Tech XTears are replaced with laser rings that pierce through enemies and deal damage to enemies within them. Can be charged to increase the size of the ring.: Overrides Technology Zero.
- TrisagionTears are replaced with piercing white blasts of light.: Overrides Technology Zero.
- Anti-Gravity-2 Tear Delay. Tears float in position until firing ceases, after which they will fly off in the direction they were shot in.: All of the tears fired are connected to each other by electricity, creating a series of electric fences.
- Cricket's BodyGrants -1 Tear Delay and reduces Range. When tears hit an object or deplete their range, they spawn 4 smaller tears, whose Range and Damage scale with Isaac's. / Compound FractureIncreases range. Tears turn into bones, which shatter into 1-3 bone shards upon hitting an enemy or obstacle. / The ParasiteIsaac's tears split in two when they hit something.: Split tears will be connected via electricity.
- Evil EyeWhile firing tears, Isaac has a chance to fire an eye across the screen with a very slow shot speed, which will fire tears of its own in the same direction as Isaac. The eye will be destroyed if it comes into contact with an enemy or obstacle.: Tears fired by eye will be connected via electricity to Isaac's tears.
- Jacob's LadderTears fire sparks of electricity in random directions upon hitting an obstacle or enemy.: Both effects happening simultaneously creates lots of electricity.
- The Ludovico TechniqueInstead of firing tears, Isaac controls one floating tear that hover over obstacles. This tear deals constant damage when held in place over an enemy.: Electricity connects the main tear to any other tears created by Isaac.
- Pop!Replaces Isaac's tears with eyeballs that can bounce off of each other. The eyeballs are not limited by range, and will instead dissipate when they stop moving or when hitting an enemy or obstacle.: Tears in midair and tears that knock around each other will still be connected, effectively creating electric barriers.
- Sinus InfectionAdds a chance to fire a booger which sticks to enemies and poisons them.: Boogers will have electricity flowing between them even if attached to the same enemy, dealing massive damage to bosses.
| Booster Packs
- Angry Fly
Spawns a fly familiar that orbits around a random enemy and deals 5 damage per tick to enemies it comes in contact with.
- Black Hole
Throws a black hole on the ground which sucks in and damages enemies.
Increases damage by a flat 0.1 and grants a soul heart. Enemies can randomly become briefly charmed or feared. Taking damage has a chance to spawn a rainbow poop.
- Broken Modem
Enemies, enemy shots, tears, and pickups will briefly freeze in place at random intervals.
- Mystery Gift
Upon use, spawns a random item from the current room's item pool, with a chance to spawn A Lump of Coal or The Poop instead.
Upon use, spawns a sprinkler that rotates and fires tears.
- Fast Bombs
Grants 7 bombs and allows bombs to be placed rapidly.
- Buddy in a Box
Grants a familiar with a random tear effect. The familiar is randomized at the start of each floor.
- Lil Delirium
Grants a familiar that transforms into another random familiar every 10 seconds.
- HairpinFully recharges Isaac's active item upon entering a boss fight.
- Wooden CrossGrants a Holy Mantle shield upon entering a new floor, which protects against one hit of damage.
- Butter!Using an active item will drop it onto a pedestal on the ground. Taking damage may result in dropping a passive item.
- Huge GrowthMakes Isaac large for the current room, increasing his range and damage.
- Ancient RecallSpawns 3 random cards.
- Era WalkFor the current room, enemies are slowed, Isaac's speed is increased, and his shot speed is decreased.
- Jumper Cables
Grants an active item charge every 15 enemies killed.
Upon use, makes a random item from a shop, devil deal, or black market free.
Upon use, for the next two seconds, any enemy shots that come near Isaac are held in place. After the charge is depleted, they are fired back as tears.
- Moving Box
If the box is empty, picks up all items and pickups in a room and stores them. If the box is not empty, places all stored items and pickups in the current room.
- Technology Zero
Connects Isaac's tears with electricity that can damage enemies.
Upon taking damage, grants a body part as an orbital, which blocks enemy shots and deals 7 damage per tick to enemies it comes in contact with. The orbitals will be destroyed if they take enough damage from enemies or enemy shots.
- Filigree FeatherAngels drop items instead of key pieces when defeated.
- 7 Seals
Grants a random Harbinger familiar that changes every 10 seconds.
- Mr. ME!
Summons a controllable ghost that can perform various tasks depending on what it targets.
- Angelic Prism
Grants a prism orbital with a large orbital radius. Tears that pass through the prism split into four multi-colored tears.
Replaces Isaac's tears with eyeballs that can bounce off of each other. The eyeballs are not limited by range, and will instead dissipate when they stop moving or when hitting an enemy or obstacle.
- Door StopThe last door Isaac went through stays open, allowing him to leave the room even if enemies are in it.
- Death's List
Grants a reward if all enemies in a room are killed in the order they are marked.
Tears are now fired in an arc. Upon hitting the floor, an obstacle, or an enemy, they burst into many smaller tears in all directions. Increases tear delay.
Isaac's tears decelerate as they travel. Upon stopping or hitting an obstacle, they burst into 8 tears in all directions. Tears can be fired into other tears to feed them, increasing their damage.
Tears are replaced with piercing white blasts of light.
Allows Isaac to hold two active items.
- Extension CordBeams of yellow electricity flow between Isaac and his familiars, damaging any enemies between them.
Grants one soul heart. Upon entering a boss room, grants a shield that blocks one hit, then disappears.
- Sacrificial Altar
Upon use, sacrifices up to 2 familiars and spawns an item from the Devil Room Pool for each familiar sacrificed.
- Lil Spewer
Spawns a random pill, and grants a small Spewer familiar that charges up and fires different types of creep.
Spawns 3 random trinkets. Taking damage has a small chance to swallow Isaac's currently held trinket, gaining its effect permanently.
- Mystery Egg
Spawns an egg familiar, which cracks and turns into a random friendly enemy when Isaac is hurt. The egg regenerates upon entering a different room.
- Flat Stone
Tears bounce off the floor. Tears that hit an enemy after bouncing deal splash damage to all nearby enemies for 25% of Isaac's tear damage.
Grants one bone heart and spawns three red heart pickups.
- Slipped Rib
Spawns a bone familiar that circles around Isaac and reflects enemy shots.
- Hallowed Ground
Spawns a white poop familiar, which turns into a white poop when Isaac is hurt.
- Pointy Rib
Spawns a bone familiar that can be aimed with the fire buttons and does contact damage.
- Book of the Dead
Upon use, spawns a friendly Bony or an orbital bone for each enemy killed in the current room.
- Dad's Ring
Creates a ring of light around Isaac that petrifies enemies in contact.
- Divorce Papers
Spawns a Mysterious Paper, increases tears, and grants a bone heart.
- Jaw Bone
Spawns a familiar that flies the room while firing, dealing a flat 7 damage to enemies that come in contact and retrieving pickups.
- Brittle Bones
Replaces all red hearts with 6 empty bone hearts. Upon losing a bone heart, Isaac fires bones in 8 directions and permanently gains a tears up.
- Broken Shovel
While held, causes multiple Mom's Foots to come down and stomp on Isaac. One of two parts necessary to create Mom's Shovel.
- Broken Shovel
One of two parts necessary to create Mom's Shovel.
- Mom's Shovel
Spawns a trapdoor that leads to the next floor upon activation. Unlocks The Forgotten when used on a mound of dirt that appears in The Dark Room.
- Rotten PennySpawns a blue fly every time a coin is picked up.
- Baby-BenderGrants Isaac's familiars homing shots.
- Finger BoneGrants a chance to gain a bone heart upon taking damage.