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Violet Vermin Collection Trade-Up Guide

Violet Vermin Collection contains 20 items across 4 grades, from Mercenary to Elite. Its highest-grade item is Lucky Cat Hat. Compare the Assassin-to-Elite trade-up below, including the individual odds of reaching each Elite output.

20Items
3Routes
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Data snapshot
Violet Vermin Case

Container information · Series #120

Violet Vermin Case

Violet Vermin Case contains items from the Violet Vermin Collection. The case was introduced on 2018-10-15. Requires a Violet Vermin Key to open.

View official Steam contents and case details ↗

All Violet Vermin Collection Items

Base collection items, grouped by grade. Special Unusual effects and global bonus drops are separate; see the official case listing for current details.

Assumed base-drop model: 80% Mercenary, 16% Commando, 3.2% Assassin, 0.8% Elite. Each grade is split equally among its items. These user-specified assumptions exclude special drops and are separate from trade-up odds. Displayed percentages are rounded; calculations use full precision.

Grade Odds · case opening

Mercenary10 items

80.00%

Commando6 items

16.00%

Assassin3 items

3.20%

Elite1 items

0.80%

Individual Item Odds · case opening

Mercenary Grade
  • Bandit's Boots

    Mercenary · Chance: 8.00%

  • Deadbeats

    Mercenary · Chance: 8.00%

  • Hephaistos' Handcraft

    Mercenary · Chance: 8.00%

  • Highway Star

    Mercenary · Chance: 8.00%

  • Mann-O-War

    Mercenary · Chance: 8.00%

  • Mini-Engy

    Mercenary · Chance: 8.00%

  • Murderer's Motif

    Mercenary · Chance: 8.00%

  • Olympic Leapers

    Mercenary · Chance: 8.00%

  • The Arachno-Arsonist

    Mercenary · Chance: 8.00%

  • Vampire Vanquisher

    Mercenary · Chance: 8.00%

Commando Grade
  • Aim Assistant

    Commando · Chance: 2.67%

  • Athenian Attire

    Commando · Chance: 2.67%

  • Dressperado

    Commando · Chance: 2.67%

  • Gaelic Glutton

    Commando · Chance: 2.67%

  • Pyro in Chinatown

    Commando · Chance: 2.67%

  • The Tank Top

    Commando · Chance: 2.67%

Assassin Grade
  • Defragmenting Hard Hat 17%

    Assassin · Chance: 1.07%

  • Mr. Quackers

    Assassin · Chance: 1.07%

  • Terror-Antula

    Assassin · Chance: 1.07%

Elite Grade
  • Lucky Cat Hat

    Elite · Chance: 0.80%

Available trade-up routes

Lowest clean sell listing in; highest clean buy order out.

Violet Vermin Collection route

Mercenary→Commando

Load non-StrangeLoad Strange

Non-Strange

unique
10× cost31.10 ref
Expected value17.57 ref
Expected P/L−13.53 ref
ROI-43.5%
Win chance17%
Cheapest quoted inputMann-O-War3.11 ref each

Strange

strange
10× cost45.50 ref
Expected value48.86 ref
Expected P/L+3.37 ref
ROI7.4%
Win chance17%
Cheapest quoted inputMann-O-War4.55 ref each

Eligible Mercenary inputs

ItemNon-Strange askStrange askMarkets
Bandit's Boots7.44 ref12.88 ref
Deadbeats5.11 ref16.88 ref
Hephaistos' Handcraft6.22 ref13.00 ref
Highway Star6.11 ref10.77 ref
Mann-O-War3.11 ref4.55 ref
Mini-Engy3.44 refNo eligible quote
Murderer's MotifNo eligible quote15.00 ref
Olympic Leapers4.22 ref11.33 ref
The Arachno-Arsonist6.88 ref25.44 ref
Vampire Vanquisher3.55 ref8.22 ref

Possible Commando outputs

Trade-up odds for 10 inputs from this collection—not case-opening odds.

ItemOddsNon-Strange bidStrange bidMarkets
Aim Assistant16.7%12.22 ref40.55 ref
Athenian Attire16.7%11.00 ref35.77 ref
Dressperado16.7%10.33 ref31.11 ref
Gaelic Glutton16.7%59.88 ref1 key + 48.77 ref
Pyro in Chinatown16.7%7.22 ref43.11 ref
The Tank Top16.7%4.77 ref29.55 ref

Violet Vermin Collection route

Commando→Assassin

Load non-StrangeLoad Strange

Non-Strange

unique
10× cost54.40 ref
Expected value60.07 ref
Expected P/L+5.67 ref
ROI10.4%
Win chance33%
Cheapest quoted inputThe Tank Top5.44 ref each

Strange

strange
10× cost4 keys + 60.38 ref
Expected value3 keys + 28.07 ref
Expected P/L−1 key − 32.31 ref
ROI-30.4%
Win chance0%
Cheapest quoted inputDressperado31.77 ref each

Eligible Commando inputs

ItemNon-Strange askStrange askMarkets
Aim Assistant12.88 ref41.33 ref
Athenian Attire13.55 ref37.55 ref
Dressperado10.33 ref31.77 ref
Gaelic Glutton60.44 ref1 key + 53.00 ref
Pyro in Chinatown8.55 ref43.44 ref
The Tank Top5.44 ref37.66 ref

Possible Assassin outputs

Trade-up odds for 10 inputs from this collection—not case-opening odds.

ItemOddsNon-Strange bidStrange bidMarkets
Defragmenting Hard Hat 17%33.3%49.44 ref3 keys + 14.66 ref
Mr. Quackers33.3%1 key + 27.00 ref4 keys + 17.55 ref
Terror-Antula33.3%39.44 ref2 keys + 52.00 ref

Violet Vermin Collection route

Assassin→Elite

Load non-StrangeLoad Strange

Non-Strange

unique
10× cost7 keys + 44.09 ref
Expected value6 keys + 41.55 ref
Expected P/L−1 key − 2.54 ref
ROI-13.5%
Win chance0%
Cheapest quoted inputDefragmenting Hard Hat 17%49.44 ref each

Strange

strange
10× cost40 keys
Expected value23 keys + 39.88 ref
Expected P/L−16 keys − 24.45 ref
ROI-41.0%
Win chance0%
Cheapest quoted inputDefragmenting Hard Hat 17%4 keys each

Eligible Assassin inputs

ItemNon-Strange askStrange askMarkets
Defragmenting Hard Hat 17%49.44 ref4 keys
Mr. Quackers1 key + 35.77 refNo eligible quote
Terror-AntulaNo eligible quoteNo eligible quote

Possible Elite outputs

Trade-up odds for 10 inputs from this collection—not case-opening odds.

ItemOddsNon-Strange bidStrange bidMarkets
Lucky Cat Hat100.0%6 keys + 41.55 ref23 keys + 39.88 ref

How to trade up to Violet Vermin Collection items

How to trade up to Aim Assistant

Use ten eligible Mercenary inputs from Violet Vermin Collection for a 16.67% chance of Aim Assistant, one of 6 Commando outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 8.33%. Neither recipe guarantees this item.

Calculate Aim Assistant trade-up odds →

How to trade up to Athenian Attire

Use ten eligible Mercenary inputs from Violet Vermin Collection for a 16.67% chance of Athenian Attire, one of 6 Commando outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 8.33%. Neither recipe guarantees this item.

Calculate Athenian Attire trade-up odds →

How to trade up to Dressperado

Use ten eligible Mercenary inputs from Violet Vermin Collection for a 16.67% chance of Dressperado, one of 6 Commando outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 8.33%. Neither recipe guarantees this item.

Calculate Dressperado trade-up odds →

How to trade up to Gaelic Glutton

Use ten eligible Mercenary inputs from Violet Vermin Collection for a 16.67% chance of Gaelic Glutton, one of 6 Commando outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 8.33%. Neither recipe guarantees this item.

Calculate Gaelic Glutton trade-up odds →

How to trade up to Pyro in Chinatown

Use ten eligible Mercenary inputs from Violet Vermin Collection for a 16.67% chance of Pyro in Chinatown, one of 6 Commando outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 8.33%. Neither recipe guarantees this item.

Calculate Pyro in Chinatown trade-up odds →

How to trade up to The Tank Top

Use ten eligible Mercenary inputs from Violet Vermin Collection for a 16.67% chance of The Tank Top, one of 6 Commando outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 8.33%. Neither recipe guarantees this item.

Calculate The Tank Top trade-up odds →

How to trade up to Defragmenting Hard Hat 17%

Use ten eligible Commando inputs from Violet Vermin Collection for a 33.33% chance of Defragmenting Hard Hat 17%, one of 3 Assassin outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 16.67%. Neither recipe guarantees this item.

Calculate Defragmenting Hard Hat 17% trade-up odds →

How to trade up to Mr. Quackers

Use ten eligible Commando inputs from Violet Vermin Collection for a 33.33% chance of Mr. Quackers, one of 3 Assassin outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 16.67%. Neither recipe guarantees this item.

Calculate Mr. Quackers trade-up odds →

How to trade up to Terror-Antula

Use ten eligible Commando inputs from Violet Vermin Collection for a 33.33% chance of Terror-Antula, one of 3 Assassin outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 16.67%. Neither recipe guarantees this item.

Calculate Terror-Antula trade-up odds →

How to trade up to Lucky Cat Hat

Use ten eligible Assassin inputs from Violet Vermin Collection for a 100.00% chance of Lucky Cat Hat, one of 1 Elite outputs. With five inputs from this collection in a compatible mixed contract, that chance becomes 50.00%. Neither recipe guarantees this item.

Calculate Lucky Cat Hat trade-up odds →

How Violet Vermin Collection odds work

With ten Violet Vermin Collection inputs, every next-rarity item shown in the applicable output table has an equal chance. The number of input item names does not change those single-collection odds.

In a mixed contract, each individual input contributes 10% to its collection. Five inputs from this collection therefore assign 50% of the contract to this collection, split evenly among its possible outputs.

Strange and non-Strange items cannot be combined in one contract. Their prices and profitability can differ substantially, so this page calculates them separately.

Market depth, price movement and seller availability are not modeled. Always open the marketplace links and confirm that ten clean, eligible inputs can actually be purchased before trading.

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