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Fallout 76-Database-Mutations and Addictions-Unstable Isotope
All Mutations and Addictions

Unstable Isotope
Fallout 76 Mutation

Unstable Isotope

Medium chance to release a radiation blast when struck in melee. Minor damage to player during the radiation blast.

Mutation
Medium chance to release a radiation blast when struck in melee. Minor damage to player during the radiation blast.

Unstable Isotope is a mutation in Fallout 76. It can be gained reliably from the Unstable Isotope Serum.

1 perk and 2 team conditions change what it does.

Unstable Isotope Builds

Level 200+
s6
p10
e5
c3
i8
a15
l9
Human Pistol
Reverse Onslaught build
Level 300+
s10
p15
e1
c9
i10
a1
l10
The "Ultimate" PAck-Mule Ghoul
Loot Goblin build
Level 300+
s12
p10
e8
c5
i1
a10
l10
Western Ghoul
Fallout 76 build
Level 300+
s15
p9
e10
c5
i5
a10
l2
Feral Melee
Fallout 76 build
Level 300+
s9
p10
e9
c3
i5
a10
l10
Ghoul
Ghoul commando build
Level 300+
s15
p8
e9
c3
i1
a10
l10
Heavy Runner
Fallout 76 build
Level 300+
s7
p10
e10
c3
i1
a15
l10
Western Jenobi
Fallout 76 build
Level 300+
s5
p7
e8
c1
i10
a15
l10
Assaultron Head 100k dmg
Reverse onslaught battleloaders ghoul build
Level 300+
s8
p10
e14
c5
i1
a10
l8
John Doe
Fallout 76 build
Show all 71
builds

Jump into the character build planner with this mutation, plus the perks and conditions you've toggled, already selected, then build the rest of your loadout around it.

Create a build with Unstable Isotope

Modifiers

These perks and team conditions change what Unstable Isotope does. Toggle them and watch the effects above update.
Perk
1
Strange In Numbers
lvl
42

Positive mutation effects are +25% stronger if teammates are mutated too.

Condition
Team
Condition
Has Mutated Teammate

Granted by

Consumables (1)
Unstable Isotope Serum

When you take melee damage, a radiation effect may be created. This damages you and your foes.

0.25

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