Storage Hunters: Open World Mutations
Multiplier tiers from Dirty through Secret, stacks that add at the shop counter, reverse calculator, and best items to chase rolls on.
By Bloxron Editorial Team · Last updated
Mutations overview
Sell multipliers from Secret (50×) and Void (35×) down through Extraterrestrial 25×, Hologram 15×, Chrome/Timeless 12×, and Pure ~1.5×–2×. Multipliers add at the shop counter — two 2× rolls become +4, not ×4. Locker previews never show them, so cap bids on base price only.
Deep links: calculator, accessories.
How mutations work
Previews show base values only. Mutations proc later at the shop counter and add their multipliers together. Values over $1,000 also hit the 60% condition curve — run both paths in the calculator before you paddle past net zero.
Mutations are sell-price rolls on graded loot. Void, Gold, Dirty, and the rest. They add at the shop counter, not in the auction preview. Silver (2x) and Gold (4x) on the same piece pay 6x total (2 + 4), not 8x. A Cheeseburger at $0.10 base with Void (35x) pays about $3.50; the same Void on Gangster Dominus ($15,000) pays $525,000. Run the stack in the calculator before you bid.
Mutation multiplier table
Obtainable sell multipliers climb from Secret at 50× and Void at 35× through Extraterrestrial at 25×, Hologram at 15×, Chrome and Timeless at 12×, Gem and Abducted at 10×, then Diamond at 8× and Corrupted, Shocked, or Wet at 6×. Pure sits near 1.5×-2×. Multipliers add at the counter — they do not multiply — and locker previews never show them. Rainbow stays unknown; Black is unobtainable and stays out of calculators.
| Mutation | Multiplier | Visual | Status |
|---|---|---|---|
| Secret | 50× | Red-brown monospace styling | Listed |
| Void | 35× | Void purple-on-black gradient | Listed |
| Extraterrestrial | 25× | Alien purple-green cosmic aura | Listed |
| Hologram | 15× | Glowing cyan hologram treatment | Listed |
| Chrome | 12× | Mirror-bright chrome finish | Listed |
| Timeless | 12× | Permanent glowing gold treatment | Listed |
| Abducted | 10× | UFO tractor-beam green glow | Listed |
| Gem | 10× | Pink-red gem palette | Listed |
| Diamond | 8× | Crystalline diamond surface | Listed |
| Corrupted | 6× | Corrupted green-on-black neon | Listed |
| Shocked | 6× | Electric yellow-orange crackle | Listed |
| Wet | 6× | Watery cyan-blue sheen | Listed |
| Ancient | 5× | Aged olive-teal patina | Listed |
| Firefly | 5× | Soft firefly glow | Listed |
| Gold | 4× | Distinct golden shelf treatment | Listed |
| Probed | 4× | Green probe-scan overlay | Listed |
| Spotless | 3× | Pristine cosmetic condition | Listed |
| Antique | 2× | Aged antique styling | Listed |
| Huge | 2× | Oversized bold display | Listed |
| Silver | 2× | Silver metallic finish | Listed |
| Tiny | 2× | Shrunken display size | Listed |
| Moonlit | 1.5× | Dark-purple moonlit tint | Listed |
| Pure | 1.5× | Clean untouched locker look | Listed |
| Cobwebbed | 1.2× | Cobweb overlay on long-stored loot | Listed |
| Dirty | 0.8× | Grimy locker residue | Listed |
| Black | Unobtainable | Dark unobtainable treatment | Unobtainable |
| Dusty | Live sell | Wild West garage roll; wash for a chance at Saloon Sparkle | Unknown |
| Goldrush | Live sell | Wild West garage roll (Sep 12-26, 2026) | Unknown |
| Gunsmoked | Live sell | Wild West garage roll (Sep 12-26, 2026) | Unknown |
| Rainbow | ? | Full rainbow gradient | Unknown |
| Saloon Sparkle | Live sell | Wash a Dusty item for a chance to convert the mutator | Unknown |
| Tumbleweed | Live sell | Wild West garage roll (Sep 12-26, 2026) | Unknown |
Wild West event rolls
Dusty, Tumbleweed, Gunsmoked, and Goldrush rolled during Wild West (Sep 12-26, 2026; closed). Owned pieces still sell; wash Dusty for a chance at Saloon Sparkle when that UI is available.
Four limited mutators dropped from Wild West auction garages: Dusty, Tumbleweed, Gunsmoked, and Goldrush. Wash a Dusty item for a chance at Saloon Sparkle. Read your live sell screen for payouts. Owned mutators stay after Sep 26; new Wild West rolls stopped when The Mines replaced the card.
Nugget farms and Market spins are on the auction page.
Alien Invasion event rolls
The Aug 15–22 limited garages added Probed (4×), Abducted (10×), and Extraterrestrial (25×). New rolls stopped when Business Bay replaced the event yards. The calculator still includes them for graded stock you already own.
The Mines cauldron mutators
Mixing Cauldron jewel events (Sep 26 – Oct 3 [⛏️] card): brew Ruby (5 jewels → 110×) or Titanium (15 → 7×) for a 20-minute server mutator. Middle jewels need 7–14 crystals — multipliers on the live brew UI. 30-minute brew cooldown; same jewel again after 4 hours.
Mixing Cauldron jewel events apply server-wide sell mutators for about 20 minutes. Published endpoints: Ruby 110× (5 jewels) and Titanium 7× (15 jewels). Owned graded pieces keep whatever mutator they rolled; new cauldron windows follow brew cooldowns while the mine loop is reachable.
Full cauldron brew table and auction bays are on the auction page.
How stacks add
Multipliers add — they do not multiply. Example: 2× + 4× = 6× total on base, not 8×. Use the stacking examples below before you paddle past net zero on Pearl Dominus (~$240K) or Gangster Dominus (~$15K) previews.
Multiple mutations on one item add into one combined multiplier at sell time. Silver (2x) plus Gold (4x) is 6x total, not 8x. When picking a Gavel Trophy, compare how many multiplier points it adds to your stack, not just the shelf flash. Try stacks in the calculator and read the auction page for max-bid tips.
| Example | Math | Shelf payout | Note |
|---|---|---|---|
| Silver + Gold | 2× + 4× = 6× | $1,000 base → $6,000 shelf | Not 8×: multipliers add. |
| Scrap Dominus + Void | 35× on $565 base | $19,775 | High-base accessory example. |
| Scrap Dominus + Void + Gold | 35× + 4× = 39× | $22,035 | Still additive: not 35 × 4. |
| Gangster Dominus + Secret | 50× on $15,000 base | $750,000 | Why base price beats proc color. |
| Dirty + Pure | 0.8× + 1.5× = 2.3× | Penalty offset by second proc | Check the full stack before listing. |
Guess an unknown roll
Reverse the shelf price when the mutation name is unclear. Multi-mutation pieces need care.
Know the sell price but not the mutation? Enter sell price (p), the item's 100% max from Collection or the items page (m), and condition (c). Works best with only one mutation on the piece.
Exact shelf price with one unknown mutation
100% value from Collection or wiki
Current condition percentage
Works best on items with a single mutation. The pre-filled Dirty Pressure Cooker example (p 120.78, m 160, c 92) should read about 0.8×: matching Dirty.
Sell price math
The game applies the mutation multiplier before the condition curve. Values over $1,000 hit a 60% cap, so the reverse tool checks both uncapped and capped paths.
Base sell (before mutation) uses this curve, V as final sell value, C as condition (0-100), and Vmax as the base value from Collection:
V = Vmax x (0.85 + 0.00035xVmax - |0.35 - 0.00035xVmax|^2) + [Vmax - Vmax x (curve term)] x (C / 100)
To reverse a single mutation multiplier M from shelf price P:
Uncapped (U):
U = -(0.25 + 0.75xC/100)
+ sqrt[(0.25 + 0.75xC/100)^2 + 0.0014x(1-C/100)xP / (0.0007x(1-C/100)xVmax)]
Capped (Ct):
Ct = P / (Vmax x (0.60 + 0.40 x C/100))
Unified:
M = (U + Ct + |U - Ct|) / 2The calculator above uses this, usually close enough to narrow down the roll.
Chase targets
High-base items with legendary multipliers. Floor loot rarely pays for Void hunts.
Secret commonly lists at 50x, treat top procs as windfalls, not planned drops, and re-check the sell screen if another table shows Secret as unknown. Void (35x), Hologram (15x), Chrome and Timeless (12x each), and Gem (10x) are the next-best single rolls. Diamond, Corrupted, Shocked, and Wet (6x-8x) work well as stacking partners on high-base machinery and accessories. Top multipliers on floor loot still pay pocket change, bid where base prices are high, especially Shipyard industrial pieces, Power Plant lockers, and Exclusive wearables.
How mutations roll
Rolls happen at grade/sell time, not in the auction preview.
Mutations land on items from won lockers. The roll system is area-agnostic, the same roster can proc in Junk Yard through Business Bay (and on the Power Plant island). What changes by yard is base price: a Hologram (15x) on Shipyard machinery pays far more than the same proc on starter clutter. Practical chasing is volume plus targeting, bid where bases are high, especially accessory exclusives and industrial loot from the areas page.
Common mistakes
Assuming multipliers multiply instead of add. Selling Dirty items without checking for a second proc. Chasing Void on Junk Yard floor loot. Using the reverse calculator on multi-mutation pieces. Skipping the calculator mid-bid war.
FAQ
How many mutations are in the game?
The roster covers every known sell modifier from Dirty (0.8×) through Secret, plus Alien Invasion rolls (Probed, Abducted, Extraterrestrial) and Wild West event rolls (Dusty, Tumbleweed, Gunsmoked, Goldrush, Saloon Sparkle). Confirm Wild West sell rates on your live counter. Rainbow stays unknown; Black is unobtainable and excluded from calculators.
Do mutation multipliers add or multiply when stacked?
They add. Silver (2×) plus Gold (4×) pays at 6× combined, not 8×. Void (35×) plus Diamond (8×) totals 43×, not 280×.
Which mutation has the highest multiplier?
Secret commonly lists at 50×; still check the sell screen if a table elsewhere shows "?". Void follows at 35×; Hologram is next at 15×; Chrome and Timeless tie at 12×. Rainbow appears in the roster but its multiplier is still unsettled, so do not plan bids on a hard Rainbow number.
What were the Alien Invasion mutations?
The Aug 15-22 event added Probed (4×), Abducted (10×), and Extraterrestrial (25×). New rolls stopped when Business Bay opened. Graded inventory you already own still sells at those multipliers in the calculator.
What are The Mines cauldron mutators?
Feed jewels at the Mixing Cauldron for a 20-minute server mutator. Ruby needs 5 jewels for 110×; Titanium needs 15 for 7×. One brew every 30 minutes; same jewel again after 4 hours. Middle jewel multipliers sit on the live brew UI.
What are the Wild West mutations?
Dusty, Tumbleweed, Gunsmoked, and Goldrush dropped from Wild West garages during Sep 12-26, 2026 (closed). Owned pieces still sell; new rolls stopped. Wash Dusty for a chance at Saloon Sparkle when that UI is available. Confirm sell multipliers on your live counter.
What does Dirty do?
Dirty is the only negative modifier at 0.8×: it sells below base. Never quick-sell a Dirty item without checking for a second proc; one positive mutation on the same piece cancels the penalty under additive stacking.
How do I identify an unknown mutation?
Use the mutation multiplier calculator on this page. Enter your exact sell price (p), the item's 100% base max from Collection (m), and current condition (c). It works best when the item has only one mutation, the Dirty Pressure Cooker example pre-fills to about 0.8×.
What is Relative Added Value Boost?
When choosing a Gavel Trophy, compare how many multiplier points it adds to your stack, not just the shelf number. +4× Gold on a $565 base beats +2× Silver in dollars, but it depends on what is already stacked.
Where should I chase high multipliers?
On the highest-base loot you can afford. Shipyard machinery and exclusive accessories, not Junk Yard clutter. Void on a $0.10 item is pocket change; Void on Scrap Dominus ($565) pays about $19,775.
When do mutations apply?
At sell time when a customer buys the listed item. Auction previews show base values only. Grading changes base before the multiplier applies; Lucky Grading gamepass and mutations stack independently.
Is there a calculator for mutation stacks?
Yes: the sell-value calculator loads priced item bases and known multipliers so you can preview shelf payout before you chase rolls at auction. This page also includes a reverse calculator to guess an unknown single mutation from sell price.