Gamma World 4th Edition is the most complete ruleset at this point. Mutations are missing on everything except Out of the box mutations for 4th edition.
Tech Level
1 = Stone Age
2 = Dungeons and Dragons
3 = Steam Punk / Old West / Boot Hill
4 = World War 2
5 = Cybernetics, Synthetics, and Microcomputers
6 = Rayguns and Spaceships
Genotype
Human = Pure Strain Human
Mutant Human = A Human who has been mutated
Pure Strain Animals = An intelligent Animal who is immune to mutations.
Mutant Animals (Animants) = Mutant Animals that are not humanoid.
Mutant Animals (Manimals) = Mutant Animals that are humanoid.
Mutant Plant = Mutant Plants, Fungi, and other Non-Animal / Human mutants.
{%Genotype = {$Genotype} %}
{%ideal={CHART(id="9657", cols="1")}%}
{%if System == {MCC}%}
{%str={3d6}%}
{%dex={3d6}%}
{%con={3d6}%}
{%hp={1d6}%}
{%chr={3d6}%}
{%int={3d6}%}
{%wis={3d6}%}
{%MCCstrM={CHART(id="7971", filter="as{$str}", filter_cols="1" cols="2")}%}
{%MCCdexM={CHART(id="7971", filter="as{$dex}", filter_cols="1" cols="2")}%}
{%MCCconM={CHART(id="7971", filter="as{$con}", filter_cols="1" cols="2")}%}
{%MCCchrM={CHART(id="7971", filter="as{$chr}", filter_cols="1" cols="2")}%}
{%MCCintM={CHART(id="7971", filter="as{$int}", filter_cols="1" cols="2")}%}
{%MCCwisM={CHART(id="7971", filter="as{$wis}", filter_cols="1" cols="2")}%}
{%MCCMaxTech={CHART(id="7971", filter="as{$int}", filter_cols="1" cols="3")}%}
{%if Sex == {Male}%}
{%end%}
{%end%}
{%if System == {Gamma World 1}%}
{%str = {3d6} %}
{%dex = {3d6} %}
{%con = {3d6} %}
{%con = {3d6} %}
{%int = {3d6} %}
{%wis = {3d6} %}
{%if Genotype == {Human}%}
{%chr={min(18,3d6+3)} %}
{%else%}
{%chr={3d6} %}
{%end%}
{%hp = {{$con}d6} %}
{%end%}
{%if System == {Gamma World 2}%}
{%str={highest(3, 4d6)}%}
{%dex={highest(3, 4d6)}%}
{%if Sex == {Genderless}%}
{%end%}
{%chr = {min(21,4d6)} %}
{%int = {min(21,4d6)} %}
{%hp = {{$con}d8} %}
{%else%}
{%con={highest(3, 4d6)} %}
{%chr={highest(3, 4d6)} %}
{%int={highest(3, 4d6)}%}
{%hp = {{$con}d6} %}
{%end%}
{%wis={highest(3, 4d6)}%}
{%if Sex == {Male}%}
{%if System == {Gamma World 3}%}
{%str = {highest(3, 4d6)} %}
{%dex = {highest(3, 4d6)} %}
{%chr = {highest(3, 4d6)} %}
{%int = {highest(3, 4d6)} %}
{%if Genotype == {Human}%}
{%temp = {highest(3, 4d6)}%}
{%wis={{$temp}-3} %}
{%else%}
{%wis={highest(3, 4d6)} %}
{%end%}
{% con = {highest(3, 4d6)} %}
{% temp = {{$con}d6} %}
{% hp = {{$con} + {$temp}} %}
{%end%}
{%if System == {Gamma World 4}%}
{%if Genotype == {Human}%}
{%str = {highest(3, 4d6)} %}
{%dex = {highest(3, 4d6)} %}
{%con = {highest(3, 4d6)} %}
{%con = {{$con}+3} %}
{%wis = {highest(3, 4d6)} %}
{%chr = {highest(3, 4d6)} %}
{%chr = {{$chr}+3} %}
{%int = {highest(3, 4d6)} %}
{%int = {{$int}+3} %}
{%sn = {3d6} %}
{%end%}
{%if Genotype == {Mutant Human}%}
{%str = {highest(3, 4d6)} %}
{%dex = {highest(3, 4d6)} %}
{%con = {highest(3, 4d6)} %}
{%con = {max (8, {$con}) } %}
{%wis = {highest(3, 4d6)} %}
{%chr = {highest(3, 4d6)} %}
{%int = {highest(3, 4d6)} %}
{%sn = {3d6} %}
{%end%}
{%if Genotype == {Pure Strain Animals}%}
{%str = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="2")} %}
{%dex = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="3")} %}
{%con = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="4")} %}
{%wis = {3d6} %}
{%chr = {3d6} %}
{%int = {3d6} %}
{%sn = {highest(3, 4d6)} %}
{%end%}
{%if Genotype == {Mutant Animal (Animants)}%}
{%str = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="2")} %}
{%dex = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="3")} %}
{%con = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="4")} %}
{%wis = {3d6} %}
{%chr = {3d6} %}
{%int = {3d6} %}
{%sn = {highest(3, 4d6)} %}
{%end%}
{%if Genotype == {Mutant Animal (Manimals)}%}
{%str = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="2")} %}
{%dex = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="3")} %}
{%con = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="4")} %}
{%wis = {3d6} %}
{%chr = {3d6} %}
{%int = {3d6} %}
{%sn = {highest(3, 4d6)} %}
{%end%}
{%if Genotype == {Mutant Plant}%}
Mutant Plants are under construction
{%str = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="2")} %}
{%dex = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="3")} %}
{%con = {2d4+CHART(id="9179", filter="{$Animal_Type}" cols="4")} %}
{%wis = {3d6} %}
{%chr = {3d6} %}
{%int = {3d6} %}
{%sn = {highest(3, 4d6)} %}
{%end%}
{%hp = {{$con}d6+{$con}} %}
{%end%}
{%if System == {Gamma World 5}%}
Gamma World 5th Edition - Not completed
{%end%}
{%if System == {Gamma World 6}%}
Gamma World 6th Edition - Not completed
{%end%}
{%if System == {Gamma World 7}%}
Gamma World 7th Edition - Not completed
{%end%}
{% FirstName = "Bob" %}
{%if Sex == "Male"%}
{% FirstName = {CHART(8450)} %}
{%end%}
{%if Sex == "Female"%}
{% FirstName = {CHART(8451)} %}
{%end%}
{%if Sex == "Genderless"%}
{% FirstName = {CHART(8452)} %}
{%end%}
Introduction: Hi, my name is {$FirstName}; I am {%if Genotype == {Mutant Human}%}a mutated human{%end%}{%if Genotype == {Mutant Plant}%}a mutated plant {%end%}{%if Genotype == {Human}%}an unmutated human{%end%}{%if Genotype == {Mutant Animal (Animants)}%}a mutanted {$Animal_Type}{%end%}{%if Genotype == {Mutant Animal (Manimals)}%}a humanoid {$Animal_Type}{%end%}{%if Genotype == {Pure Strain Animals}%}an uplifted {$Animal_Type}{%end%}. One thing you should know about me is that Roll on "Traits" Roll on "Ideals" (cols="2", filter="{$ideal}", filter_cols="1"). I want LOWER(Roll on "What Drives Me").
Background Information: {%if Sex == {Male}%}He is{%end%}{%if Sex == {Female}%}She is{%end%}{%if Sex == {Genderless}%}They are{%end%} Roll on "Height" {$Sex} {%if Genotype == {Mutant Plant}%}Mutant Plant{%end%}{%if Genotype == {Human}%}Pure Strain Human{%end%}{%if Genotype == {Mutant Animal (Animants)}%}Mutant {$Animal_Type}{%end%}{%if Genotype == {Mutant Animal (Manimals)}%}Humanoid {$Animal_Type}{%end%}{%if Genotype == {Pure Strain Animals}%}Intelligent {$Animal_Type}{%end%} with a Roll on "Build" build, Roll on "Human Eyes" eyes, and Roll on "Hair" Roll on "Human hair" hair. {%if Sex == {Male}%}His{%end%}{%if Sex == {Female}%}Her{%end%}{%if Sex == {Genderless}%}Their{%end%} face Roll on "Facial features" and {%if Sex == {Male}%}he{%end%}{%if Sex == {Female}%}she{%end%}{%if Sex == {Genderless}%}they {%end%} speak{%if Sex == {Male}%}s{%end%}{%if Sex == {Female}%}s{%end%}{%if Sex == {Genderless}%}{%end%} with a Roll on "Speech" voice. {%if Sex == {Male}%}He {%end%}{%if Sex == {Female}%}She {%end%}{%if Sex == {Genderless}%}They {%end%}has a reputation that {%if Sex == {Male}%}he{%end%}{%if Sex == {Female}%}she{%end%}{%if Sex == {Genderless}%}they{%end%} LOWER(Roll on "Characteristics") and for being LOWER(Roll on "Personality").
System: {$System}
Gender: {$Sex}
My Personal Moral Code: ({$ideal})
Suggested Alignment: Roll on "Ideals" (cols="3", filter="{$ideal}", filter_cols="1")
Armor: Roll on "Armor" (cols="{$Tech_Level}", filter_cols="1")
Weapon: Roll on "Weapons" (cols="{$Tech_Level}", filter_cols="1")
Inventory: Roll on "Primary Gear with Quality" 2d3 times (unique results only)
Miscellaneous Possessions: Roll on "Misc gear with Quality" 2d4 times (unique results only)
Roll on "Stat Block" (cols="2", filter="{$System}", filter_cols="1")