MeatSlicer/docs/items.md

Items

All 60 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 on the pedestal and in your item tray). Each duplicate re-applies the item's effect — multiplicative stats compound, additive stats stack linearly.
• Tier caps are per-item. Simple stat items stack deep (up to VIII); build-defining and legendary items cap at III or I. Picking up a duplicate at cap instead grants +150 score and 5 XP gems with a "MAX" toast.
• Every item has a rarity band — Common, Uncommon, Rare, or Legendary — which drives both its drop weight and how much it inflates enemy scaling (see below).
• Item rolls use a "smart roll": a small chance to upgrade an item you already own (below cap), otherwise a weighted roll from the source's pool. Builds naturally specialize, but rares stay rare.

Rarity bands

Band	Base weight	Power/tier	Typical cap	Colour
Common	100	0.5	V–VIII	bone
Uncommon	55	1.0	IV–VI	teal
Rare	25	1.5	II–III	gold
Legendary	8	3.0	I	red

Power score (drives enemy HP/speed scaling) = perks × 0.5 + Σ(item tier × band power). A deep stack of commons inflates difficulty far less than a few rares.

Where items come from

Source	Chance	Pool tilt
Item room pedestal	Guaranteed (1 per floor)	Favours Uncommon / Rare
Boss kill	Guaranteed (1 pedestal)	Favours Rare / Legendary (boss-only)
Elite enemy kill	18% + luck × 10%	Favours Common

Legendary items are boss-exclusive — they never roll from item rooms or elites. Items already at their tier cap are excluded from fresh rolls, so pedestals don't waste themselves.

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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, +6% shot speed	rateMul ×1.18, shotSpeedMul ×1.06
Bonemeal Powder	+15% damage, +15% shot speed	dmgMul ×1.15, shotSpeedMul ×1.15
Marrow Piston	+30% knockback, +12% attack size	knockbackMul ×1.30, sizeMul ×1.12
Whipcord Tendon	+20% range, +8% fire rate	rangeMul ×1.20, rateMul ×1.08
Butcher's Twine	+12% bleed, +8% fire rate	bleed +0.12, rateMul ×1.08

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)
Gyroscopic Ribs	+2 bounce, +10% range	bounce +2, rangeMul ×1.10
Split Cortex	+1 pierce, +1 chain	pierce +1, chain +1 — Rare hybrid projectile modifier
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
Chill Gland	18% chance to chill	+0.18 chance — slows enemies (activates the previously unused slowOnHit stat)
Cinder Sump	+12% ignite, +12% acid	igniteChance +0.12, acidOnHit +0.12 — dual-element hybrid
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 to full	maxHp +2, hp = maxHp — the premium Rare HP item
Rendered Fat	+½ heart, +4% armor	maxHp +1, armor +0.04, heal 1 — clean hybrid HP/armor
Gristle Cord	+0.12s hurt immunity, +4% armor	invBonus +0.12, armor +0.04
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	+15% drop luck, +25% pickup radius	luck +0.15, magnet ×1.25
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	+14% move speed	speedMul ×1.14 (178 → ~203 px/s at tier I)
Gorged Tick	+15% XP, +10% luck	xpMul ×1.15, luck +0.10
Hooked Sinew	+30% pickup pull speed, +10% radius	magnetPull ×1.30, magnet ×1.10 (activates the magnetPull stat)
Rusted Diadem	+40% orbital speed	orbSpeedMul ×1.40
Rimed Fang	+4% crit chance, +25% crit damage	crit +0.04, critMul +0.25

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Complete item index (A–Z)

#	Item	Rarity	Cap	Category
1	Acid Gland	Uncommon	VI	On-hit proc
2	Backstabber	Rare	III	Shot modifier
3	Bloodlust	Common	V	On-kill
4	Bloodshot Eye	Common	VIII	Criticals
5	Bloat Rounds	Uncommon	V	Damage
6	Bone Plate	Rare	III	Survivability
7	Bonemeal Powder	Common	VI	Damage
8	Brass Magazine	Common	V	Utility
9	Butcher's Twine	Uncommon	V	Fire rate
10	Chain Sinew	Uncommon	VI	On-hit proc
11	Chill Gland	Uncommon	V	On-hit proc
12	Cinder Sump	Uncommon	V	On-hit proc
13	Crow Bait	Common	V	Utility
14	Dead Man's Clock	Rare	III	Survivability
15	Dead Man's Switch	Rare	III	On-kill
16	Ember Jar	Uncommon	V	On-hit proc
17	Flayer Kiss	Uncommon	V	On-hit proc
18	Ghoul Heart	Uncommon	V	Survivability
19	Gorged Tick	Common	V	Utility
20	Gorging Leech	Common	IV	Utility
21	Grafted Trigger	Common	VI	Fire rate
22	Gristle Cord	Uncommon	IV	Survivability
23	Gyroscopic Ribs	Uncommon	IV	Shot modifier
24	Hollow Bones	Common	VI	Utility
25	Hollow Needle	Common	VI	Criticals
26	Hollow Points	Common	VI	Damage
27	Homing Tumor	Uncommon	IV	Shot modifier
28	Hook Rounds	Uncommon	V	On-hit proc
29	Hooked Sinew	Common	V	Utility
30	Hydra Maw	Rare	III	Shot modifier
31	Iron Stomach	Common	VIII	Survivability
32	Lead Marrow	Common	VIII	Shot modifier
33	Lucky Coin	Common	V	Utility
34	Magnet Maw	Common	III	Utility
35	Marrow Glut	Uncommon	VI	Damage
36	Marrow Piston	Common	V	Damage
37	Mortar Bone	Uncommon	V	On-hit proc
38	Orbit Crown	Uncommon	V	Utility
39	Orbital Knives	Rare	III	Utility
40	Piercing Gaze	Uncommon	V	Shot modifier
41	Rendered Fat	Common	VI	Survivability
42	Reroll Rib	Rare	II	Utility
43	Ricochet Ribs	Uncommon	V	Shot modifier
44	Rimed Fang	Common	VI	Criticals
45	Rusted Diadem	Uncommon	V	Utility
46	Scalpel	Common	VIII	Shot modifier
47	Second Stomach	Rare	III	Survivability
48	Sledge Rounds	Uncommon	V	On-hit proc
49	Spine Cage	Uncommon	V	Survivability
50	Spite Well	Uncommon	V	Survivability
51	Split Cortex	Rare	III	Shot modifier
52	Splinter Bone	Rare	III	Shot modifier
53	Split Tongue	Rare	III	Shot modifier
54	Tanned Hide	Common	VI	Survivability
55	Twin Hearts	Rare	III	Survivability
56	Twitch Fibers	Common	VI	Fire rate
57	Vampire Dentures	Uncommon	V	On-kill
58	Volatile Bile	Rare	III	On-kill
59	Whipcord Tendon	Uncommon	V	Damage
60	Worm Gut	Rare	III	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.