Introduction

 
THE MOD 
 
https://steamcommunity.com/sharedfiles/filedetails/?id=2515244808 
 
ABOUT THE MOD 
 
This mod adds 20+ new items related to the Half-Life universe, this guide contains detailed descriptions of each item. 
 
This guide will be updated when new items get added. 
 
 

Item Descriptions [1-10]

CROWBAR

 
“Create Your Own Entrance” 
 
 
Type: Active (3 Room Charge) 
Item Pool: Shop 
 
Upon use breaks all doors (there are some exceptions), deals 20 damage to enemies in the room and confuses the surviving enemies for a short time. 
 

TIE

 
“Ridiculous!” 
 
 
Type: Passive 
Item Pool: Treasure 
 
Gives -1 Luck and randomly charmes enemies for a short duration. The charming chance isn’t affected by Luck. 
 

CAN

 
“You Picked It Up” 
 
 
Type: Familiar 
Item Pool: Boss 
 
Gives +0.2 Speed up and a familiar that moves in a relatively far orbit around isaac. Deals 6 damage per tick and moves at moderate speed. 
 

URANIUM 235

 
“Depleted Uranium” 
 
 
Type: Passive 
Item Pool: Treasure 
 
Isaac’s tears are bright orange/yellow and he gains +2.5 damage and 25% tear size increase but loses -0.25 shot speed and one of his heart containers gets converted into a soul heart. (If there aren’t any heart containers he will simply gain a soul heart) 
 

RETINAL SCANNER

 
“Access Denied” 
 
 
Type: Active (4 Room Charge) 
Item Pool: Shop 
 
When activated, the doors will close and 4 to 8 enemies and a random chest will spawn in the room. This is similar to a challenge room but it’s only a single wave and does not grant an item charge on completion. (Possible enemies include: Gaper, Maggot, Maw, Brain, Big Spider) 
 

FORBIDDEN NUMBER

 
“More Than 2, Less Than 4” 
 
 
Type: Passive 
Item Pool: Devil 
 
Upon taking it, gives -0.3 to damage, speed and luck stats. Additionally, every time you take damage you have 30% chance to spawn 3 coins, hearts, bombs, keys or batteries. They can’t be the golden variants and the more valuable variants are rarer than the regular ones. 
 

CONSOLE

 
“sv_cheats 1” 
 
 
Type: Active (6 Room Charge) 
Item Pool: Secret 
 
Activates a random debug console effect for a single room which include; Draw Hitboxes (25%), Draw Grids (10%), Immortality (5%), +40 Damage (5%), Show Damage Values (25%), +50 Luck (15%), Kill every enemy (5%), Grid Info (10%). These chances don’t change with player’s luck stat. 
 

HEADCRAB

 
“Alien Friend!” 
 
 
Type: Passive 
Item Pool: Curse Room / Rotten Beggar 
 
Gives Isaac +0.2 speed and +0.5 damage and 1 health up. From now on every red heart isaac picks up is converted into rotten hearts. The conversion rate is 1 half red heart = 1 rotten heart. So taking a normal red heart will give Isaac 2 rotten hearts. 
 

ID CARD

 
“Who Is Barney ?” 
 
 
Type: Passive 
Item Pool: Angel 
 
Gives +0.25 shot speed, + 1.25 damage, +0.15 speed, +1 luck, +0.43 tears. Additionally, Isaac gains pseudo-piercing tears, upon killing an enemy the leftover damage from the tear that killed it carries on with the tear in the same direction instead of the tear disappearing after the kill. 
 

MEDKIT

 
“Patched Up And Ready To Go!” 
 
 
Type: Passive 
Item Pool: Boss 
 
Gives Isaac 2 health up, fills all of his missing red health and gives +0.15 speed up. 
 
 

Item Descriptions [11-20]

HIVEHAND

 
“Alien Hive At Your Command” 
 
 
Type: Passive 
Item Pool: Devil 
 
Isaac loses 40% of his damage but gains x0.7 tears multiplier, +0.61 tears, +0.15 shot speed and homing tears. This tears multiplier greatly boosts all the tears item picked up, but will also lower the damage ups significantly. 
 

BRIEFCASE

 
“It’s Not Opening…Yet” 
 
 
Type: Passive 
Item Pool: Curse Room / Red Chest 
 
Grants a black heart. Each time Isaac gets hit, there’s a 3% chance for him to get teleported to either a devil, angel or an error room. The devil and angel rooms are different than the current floor’s devil and angel rooms, and each time they will be different, even if the briefcase gets triggered twice on the same floor. 
 

ENERGY BALL

 
“Combine Tech” 
 
 
Type: Passive 
Item Pool: Devil / Demon Beggar 
 
There’s a 2% chance to fire a tear that does 4x damage, destroys rocks/doors, bouncess off enemies/walls and deletes enemy projectiles. Goes up to 100% with 12 Luck. 
 

SUIT BATTERY

 
“Filled With Power” 
 
 
Type: Active (4 Room Charge) 
Item Pool: Treasure 
 
Deals 1/2 red heart damage, grants 1 soul heart and fires 8 tech lasers in all directions. If there’s no red hearts, no red heart is taken and no soul heart is given to the player but the laser can still activate. 
 

SCIENTIST GLASSES

 
“Low Poly” 
 
 
Type: Passive 
Item Pool: Treasure 
 
Gives +0.8 tears and +0.5 damage. There’s a 10% chance to shoot a tear that splits into 4 on contact, and there’s also another 10% chance to fire a tear that splits into 2 upon hitting an enemy. When there are enemies in the room, Isaac will see everything slightly pixelated. 
 

HEV HELMET

 
“It’s Talking!” 
 
 
Type: Passive 
Item Pool: Treasure 
 
Gives Isaac explosion immunity, +1 health up and also fills all red heart containers. Explosion immunity includes all kind of explosions. 
 

HEV SUIT

 
“Black Mesa Tech” 
 
 
Type: Passive 
Item Pool: Treasure 
 
Gives Isaac spike immunity, 3 spirit hearts and also fills all red heart containers. Spike immunity includes ground spikes, spiked chests and curse rooms. As for the spiky enemies, Wall Hugger, Slide, Poky and Grudge are included. 
 

ORIGINAL DISC

 
“1998” 
 
 
Type: Active (Single Use) 
Item Pool: Red Chest / Gold Chest / Beggar / Crane Game 
 
Spawns a Half Life item from this mod based on the special room you’re in. If you’re not in a room with a specific item room, you will get a random Half Life item instead. 
 

HEALING LIQUID

 
“Embrace Purity” 
 
 
Type: Passive 
Item Pool: Angel 
 
Every new floor, if you have missing red health they will be refilled and you will also gain one soul heart. If you have full or no red health, you will gain two soul hearts. 
 

NIHILANTH’S CALL

 
“…” 
 
 
Type: Passive 
Item Pool: Devil / Demon Beggar 
Transformations: Leviathan 
 
Every new floor Isaac gains +0.8 damage up. Fills all missing red on initial pickup. If you have no red hearts in your heart containers, or no heart containers at all, you will also gain a black heart upon moving to a new floor. Otherwise, if you have any red hearts, you will lose a heart container. If you’re exactly at 1 heart container with no soul/black hearts, 5 random troll bombs will spawn. 
 
 

Item Descriptions [21-?]

SCIENTIST’S SYRINGE

 
“Heals…Sometimes” 
 
 
Type: Passive 
Item Pool: Boss / Demon Beggar 
Transformations: Spun 
 
Gives Isaac +1 Health up and heals him on some special rooms. Gives half a red heart on Boss Rooms, half a black heart on Curse Rooms or Devil Rooms, half a soul heart on Sacrifice Rooms or Angel Rooms. Each heart type can be obtained once every floor. 
 

More Items On The Way!

This is all about The Binding of Isaac: Rebirth – Half Life Items Mod Guide; I hope you enjoy reading the Guide! If you feel like we should add more information or we forget/mistake, please let us know via commenting below, and thanks! See you soon!