Perks
All 22 perks in MeatSlicer, with exact effects pulled from js/perks.js. Perks are chosen through the Mutation Draft each time you level up, and last for the rest of the run.
The Mutation Draft
- Gaining a level queues a draft. When it opens, you're offered 3 random perks from the full pool — all 22 perks are equally weighted; there is no rarity system.
- Choose with 1 / 2 / 3, by clicking a card, or press 4 / Space for a "Random Cut".
- Press R to reroll all three choices (costs 1 reroll token). Rerolls come from the Reroll Rib item, which also grants +1 reroll every level-up.
- Press T to toggle Auto-Draft: future level-ups instantly pick a random perk without pausing the game. The setting persists between sessions.
- Level-ups queue: gain two levels at once and two drafts resolve back-to-back.
XP curve
XP needed for the next level: 8 + level × 4
| Level-up |
XP needed |
Cumulative |
| 1 → 2 |
12 |
12 |
| 2 → 3 |
16 |
28 |
| 3 → 4 |
20 |
48 |
| 4 → 5 |
24 |
72 |
| 5 → 6 |
28 |
100 |
| 10 → 11 |
48 |
300 |
XP comes from gems dropped by kills, room clears, and bosses, scaled by your xpMul (Gorging Leech item, Bloodrush perk).
Offensive perks
| Perk |
Description |
Exact effect |
| Sharpened |
+4% damage |
dmgMul ×1.04 |
| Adrenal Surge |
+3.5% fire rate |
rateMul ×1.035 |
| Deadeye |
+5% shot speed |
shotSpeedMul ×1.05 |
| Long Bone |
+5% range |
rangeMul ×1.05 |
| Bone Splitter |
+2% critical chance |
crit +0.02 (base 5%) |
| Cold Precision |
+15% critical damage |
critMul +0.15 (base ×2.0) |
| Heavy Hand |
+20% knockback |
knockbackMul ×1.20 |
On-hit status perks
| Perk |
Description |
Exact effect |
| Flensing Edge |
Hits inflict light bleeding |
bleed +0.08 — 2.2 s bleed at hit damage × bleed × 0.45 DPS |
| Ember Hands |
8% chance to ignite |
igniteChance +0.08 — 1.8 s burn at 5 × dmgMul DPS |
| Chill Bile |
10% chance to slow |
slowOnHit +0.10 — 1.5 s slow (halved move speed) |
Defensive perks
| Perk |
Description |
Exact effect |
| Big Heart |
+½ max heart, heal ½ heart |
maxHp +1, heal 1 |
| Shield Heart |
+½ shield heart at the start of each floor |
shieldPerk +1, shieldHp +1 — regen: 25% of max shields (rounded up to a whole shield) each floor transition |
| Thick Hide |
+4% chance to ignore damage |
armor +0.04 — literal dodge chance, cap 75% |
| Second Wind |
+0.15s hurt immunity |
invBonus +0.15 — post-hit invulnerability 0.9 s → 1.05 s |
| Spite Flesh |
Contact attackers take damage |
thorns +4 — melee attackers take 4 × dmgMul |
| Bone Knit |
3% chance to heal ½ heart after combat rooms |
roomHealChance +0.03 (cap 90%) |
Mobility & utility perks
| Perk |
Description |
Exact effect |
| Quickening |
+3% move speed |
speedMul ×1.03 |
| Sinew Weave |
+3% move speed and range |
speedMul ×1.03, rangeMul ×1.03 |
| Magnet Bile |
+10% pickup radius |
magnet ×1.10 |
| Carrion Sense |
+8% pickup radius and pull speed |
magnet ×1.08, magnetPull ×1.08 (note: pull speed is not currently wired into pickup movement — the radius half works) |
| Bloodrush | +5% XP gain, bonus crystal chance | xpMul ×1.05 |
| Scrap Feed | 5% less ammo (diminishing) | ammoEff +0.05 per stack — saving fraction = rating/(1+rating), so each extra stack helps less (like Thick Hide) |
Complete perk index (A–Z)
| # |
Perk |
Category |
| 1 |
Adrenal Surge |
Offensive |
| 2 |
Big Heart |
Defensive |
| 3 |
Bloodrush |
Utility |
| 4 |
Bone Knit |
Defensive |
| 5 |
Bone Splitter |
Offensive |
| 6 |
Carrion Sense |
Utility |
| 7 |
Chill Bile |
On-hit |
| 8 |
Cold Precision |
Offensive |
| 9 |
Deadeye |
Offensive |
| 10 |
Ember Hands |
On-hit |
| 11 |
Flensing Edge |
On-hit |
| 12 |
Heavy Hand |
Offensive |
| 13 |
Long Bone |
Offensive |
| 14 |
Magnet Bile |
Utility |
| 15 |
Quickening |
Mobility |
| 16 |
Scrap Feed |
Utility |
| 17 |
Second Wind |
Defensive |
| 18 |
Sharpened |
Offensive |
| 19 |
Shield Heart |
Defensive |
| 20 |
Sinew Weave |
Mobility |
| 21 |
Spite Flesh |
Defensive |
| 22 |
Thick Hide |
Defensive |
Drafting advice
- Perks are small, items are big. A perk is worth ~0.5 power score; an item tier is worth 1.0. Perks smooth out a build; items define it.
- Shield Heart is one of the strongest defensive picks — it's free shield capacity that regens 25% each floor, and it stacks with Bone Plate.
- Bloodrush / Magnet Bile early compound over a long run; Sharpened / Adrenal Surge scale whatever your weapon already does well.
- With Auto-Draft on, perks become a no-attention background bonus — good for speedrunning floors, bad if you're fishing for a specific build.
