MeatSlicer/docs/items.md

Items

All 46 passive items in MeatSlicer, with exact effects pulled from js/items.js and the proc logic in js/enemies.js / js/player.js.

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How items work

• Items are passive and permanent for the run. Pick one up and its effect applies immediately.
• Duplicates upgrade the tier (shown as Roman numerals I–IX on the pedestal and in your item tray). Each duplicate re-applies the item's effect — multiplicative stats compound, additive stats stack linearly.
• Tier cap is 9. Picking up a duplicate at tier IX instead grants +150 score and 5 XP gems with a "MAX" toast.
• There is no rarity system. Item rolls use a "smart roll": 50% chance to upgrade an item you already own (below cap), 50% chance of any item from the full pool — so builds naturally specialize over a run.

Where items come from

Source	Chance
Item room pedestal	Guaranteed (1 per floor)
Boss kill	Guaranteed (1 pedestal)
Elite enemy kill	18% + luck × 10%

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Damage & Fire Rate

Item	Description	Effect per tier
Hollow Points	+25% damage	dmgMul ×1.25
Marrow Glut	+20% damage, −10% fire rate	dmgMul ×1.20, rateMul ×0.90
Bloat Rounds	+25% attack size, +10% damage	sizeMul ×1.25, dmgMul ×1.10
Twitch Fibers	+20% fire rate	rateMul ×1.20
Grafted Trigger	+18% fire rate	rateMul ×1.18

Note: attack size (sizeMul) also enlarges melee arcs, blast radii, acid pools, and projectile hitboxes — Bloat Rounds is secretly an AoE item.

Shot Modifiers

Item	Description	Effect per tier
Scalpel	+25% shot speed	shotSpeedMul ×1.25
Lead Marrow	+25% range	rangeMul ×1.25
Piercing Gaze	Shots pierce +1 enemy	pierce +1
Ricochet Ribs	Shots bounce +1 time	bounce +1 (wall bounces)
Split Tongue	Twin parallel shot	split +1 — extra parallel shots per volley
Hydra Maw	Fires 2 extra angled shots	fan +1 — extra angled shots (±0.16 rad per level)
Homing Tumor	Shots seek flesh (stronger per tier)	homing +1 — homing strength 1.6 + homing × 0.7
Backstabber	+1 rear shot	rear +1 — fires backward too
Splinter Bone	Shots shatter into +2 shards on hit	splinter +2 — on-hit shards dealing 40% of the hit's damage each

On-Hit Procs

All of these trigger from your weapon hits (orbital knives proc at half chance). Chances stack additively across tiers and are rolled per hit.

Item	Description	Exact effect per tier
Flayer Kiss	Hits inflict heavy bleeding	bleed +0.20 — every hit applies 2.2 s bleed at hit damage × bleed × 0.45 DPS
Ember Jar	20% chance to ignite	+0.20 chance — burn for 1.8 s at 5 × dmgMul DPS
Acid Gland	Hits may leave acid pools	+0.12 chance (cap 65%) — pool radius 18 × sizeMul, 2.5 s, 5 × dmgMul DPS
Hook Rounds	Hits pull enemies toward you	+0.18 chance (cap 80%) — yanks the enemy toward you at speed 170
Sledge Rounds	More knockback, hits may stun	knockbackMul ×1.35, +0.08 stun chance (cap 75%) — 0.35 s stun, non-bosses only
Chain Sinew	Hits arc to +1 nearby enemy	chain +1 — arcs to up to 6 nearby enemies within 180 px for 35% of the hit's damage each
Mortar Bone	Every sixth hit erupts	mortar +1 — every max(2, 7 − mortar) hits, AoE blast: radius 42 + mortar × 5, 55% of the hit's damage

On-Kill Effects

Item	Description	Exact effect per tier
Vampire Dentures	Kills may heal you	lifestealChance +0.04 — on kill, chance × 3 (cap 90%) to heal 1 HP (2 for elites, 4 for bosses)
Volatile Bile	Kills explode (bigger per tier)	explodeOnKill +1 — kill explosions: radius 60 + 15/tier, damage (10 + 8/tier) × dmgMul
Bloodlust	Kills may drop bonus XP	+0.12 chance per kill to drop bonus XP equal to the enemy's XP value
Dead Man's Switch	Kills trigger a fire-rate frenzy	frenzy +0.12 — any kill grants 1 + frenzy fire rate for 3 s

Survivability

Item	Description	Exact effect per tier
Iron Stomach	+½ heart container, heal ½ heart	maxHp +1, heal 1
Ghoul Heart	+2 max HP, heal 2	maxHp +2, heal 2
Twin Hearts	+1 max heart, heal 1 heart	maxHp +2, heal 2 (identical to Ghoul Heart)
Bone Plate	+½ shield heart each floor	shieldPerk +1, shieldHp +1 — shields refill every floor (1 shield HP = ½ heart, renders as half a cyan pip)
Second Stomach	+½ heart and excess healing shields	maxHp +1, heal 1, overShield +1 — overflow healing becomes shield HP
Tanned Hide	+8% chance to ignore damage	armor +0.087 — block chance armor / (1 + armor), cap 75%
Dead Man's Clock	+0.25s hurt immunity	invBonus +0.25 — post-hit invulnerability 0.9 s → 1.15 s at tier I
Worm Gut	Heal ½ heart after combat rooms	roomHeal +1 — guaranteed 1 HP heal after each combat room clear
Spine Cage	Contact attackers take damage	thorns +8 — melee attackers take 8 × dmgMul when they hurt you
Spite Well	Taking damage releases a blood nova	retaliate +10 — on hit taken: nova radius 85 × √sizeMul, damage 10 × dmgMul

Criticals

Item	Description	Effect per tier
Bloodshot Eye	+6% critical chance	crit +0.06 (base 5%)
Hollow Needle	+50% critical damage	critMul +0.50 (base ×2.0)

Utility

Item	Description	Exact effect per tier
Orbital Knives	+1 circling knife	orbitals +1 — each knife orbits you, dealing 12 × dmgMul × orbDmgMul on contact (0.35 s cooldown per enemy, half proc chance)
Orbit Crown	+25% orbital speed and damage	orbSpeedMul ×1.25, orbDmgMul ×1.25
Lucky Coin	Better drops	luck +0.2
Crow Bait	+25% drop luck	luck +0.25
Magnet Maw	+60% pickup radius	magnet ×1.6 — magnet radius 46 × magnet px
Gorging Leech	+20% XP gained	xpMul ×1.20
Reroll Rib	+1 perk reroll each level	rerollPerLevel +1 and +1 reroll immediately
Brass Magazine	15% less ammo use, +20% ammo found	ammoEff ×1.15, ammoPickupMul ×1.20 (the ×1.15 stays multiplicative; the Scrap Feed perk's additive stacks sit underneath it)
Hollow Bones	+12% move speed	speedMul ×1.12 (178 → ~199 px/s at tier I)

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Complete item index (A–Z)

#	Item	Category
1	Acid Gland	On-hit proc
2	Backstabber	Shot modifier
3	Bloodlust	On-kill
4	Bloodshot Eye	Criticals
5	Bloat Rounds	Damage
6	Bone Plate	Survivability
7	Brass Magazine	Utility
8	Chain Sinew	On-hit proc
9	Crow Bait	Utility
10	Dead Man's Clock	Survivability
11	Dead Man's Switch	On-kill
12	Ember Jar	On-hit proc
13	Flayer Kiss	On-hit proc
14	Ghoul Heart	Survivability
15	Gorging Leech	Utility
16	Grafted Trigger	Fire rate
17	Hollow Bones	Utility
18	Hollow Needle	Criticals
19	Hollow Points	Damage
20	Homing Tumor	Shot modifier
21	Hook Rounds	On-hit proc
22	Hydra Maw	Shot modifier
23	Iron Stomach	Survivability
24	Lead Marrow	Shot modifier
25	Lucky Coin	Utility
26	Magnet Maw	Utility
27	Marrow Glut	Damage
28	Mortar Bone	On-hit proc
29	Orbit Crown	Utility
30	Orbital Knives	Utility
31	Piercing Gaze	Shot modifier
32	Reroll Rib	Utility
33	Ricochet Ribs	Shot modifier
34	Scalpel	Shot modifier
35	Second Stomach	Survivability
36	Sledge Rounds	On-hit proc
37	Spine Cage	Survivability
38	Spite Well	Survivability
39	Splinter Bone	Shot modifier
40	Split Tongue	Shot modifier
41	Tanned Hide	Survivability
42	Twin Hearts	Survivability
43	Twitch Fibers	Fire rate
44	Vampire Dentures	On-kill
45	Volatile Bile	On-kill
46	Worm Gut	Survivability

Synergy notes

• Second Stomach turns every healing source into shield generation: Worm Gut, Bone Knit, Vampire Dentures, Hemophage, and hearts at full HP.
• On-hit procs scale with hit frequency — pair Flayer Kiss / Ember Jar / Chain Sinew with the Ribcage Repeater, Bile Blunderbuss, or Cauterizer.
• Split Tongue / Hydra Maw / Backstabber multiply projectile count, which multiplies proc rolls per second — the core of most broken builds.
• Piercing Gaze + Ricochet Ribs feed the slam/saw/beam "inert" bonus (+6% each) on The Tenderizer, Red Right Hand, and Spinal Tap, while also powering Swarm Jar maggots.
• Volatile Bile chains: explosions can kill, which triggers more explosions (and frenzy, and lifesteal procs).
• Bone Plate + Shield Heart (perk) stack into a large shield that refills free every floor.