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GammaFinder Index

GammaFinder is a post-apocalypse setting for the Starfinder Roleplaying Game. I have multiple articles that begin to describe and define GammaFinder, and this is the index to all of them.

PA Street Scene

The basics.

GammaFinder Rules. Simple rules for post-apocalypse gaming using Starfinder, along with just the hint of a setting *mostly to justify calling it ‘GammaFinder.’)

The Unburned World. A larger article that includes a quick description of the pre-apocalypse Unburned World, and the Chasm of History that separates it from the modern era.

Titans. Halfway between landmarks and gods, no one is sure where these motionless giants come from, or what their purpose is. But they have a real, if subtle, effect on the world around them.

Beyond the core rules, here are the things players can use.

Mega-Heroic Moments
You just get one, but when you use it, it’ll be memorable.

Alphite. You were raised in the domed city of Apha, before it was destroyed.
Brain-In-A-Jar and Murderous Toy. These stretch what themes are supposed to do to their limits, to give weirder character options.
Mutie. You are a mutant, and your mutations are evolving.

Mutamorph. Exposed to the strange energies of the World of GammaFinder, your body is morphing into… something.

Class Options
Mutant Soldier. Options for soldiers to gain mutations as class features.

Gaining Mutant Abilities. All the options for PCs to gain mutant abilities and tiered mutations, all in one post!
Advancing Mutations. In GammaFinder, sometimes YOU get weirder and weirder.
Mutations for Starting Characters. You were just born that way.
Tiered Mutations (teleportation). The rules for tiered mutations that grow in power as you focus on them, with the psychoportation tiered mutation as an example.
Danger Sense. It’s tingling! A tiered mutation.
Elasticity. Yep, it’s stretching powers. A tiered mutation.
Entangle. Slow them down, wrap them up. A tiered mutation.
ESP. Telepathy and psychic projection. A tiered mutation.
Genetic Sorcery. The power to create magic is in your DNA. A tiered mutation.
Healing Factor. A tiered mutation.
Incorporeality. A tiered mutation.
Invisibility. A tiered mutation.
Luck Manipulation. A tiered mutation.
Ranged Attack. A tiered mutation. For attacking things. At range.
Summoning. A tiered mutation.
Super-Strength. A tiered mutation. (Scroll down a bit for the mutation)
Weather Control. A tiered mutation.

Junk Magic
Two spells – junk gizmo and junk HUD.

Beyond the core rules, these are things the GM can use to help built the setting and its feel.

Hazardous Junk
The Starfinder RPG has lots of spells that use junk as an element of the casting. But what if that junk is hazardous materials?

Weird relics of the Unburned World, from before the Chasm of History. Presented conceptually in Part One, and rules for PCs trying to figure them out in Part Two.

Survival is a key theme of post-apocalypse rpgs. Starfinder has a “Survival” skill. Making skill checks to survive every day is boring, and no one wants their game to end because everyone starved to death. And tents, even high-tech tents, tend not to actually make a difference to PC’s health and happiness.
These rules fix all those issues and brings them together.

These entries are like a bestiary, but for weird mutant threats!

Hammerderm It’s a dangerous sonic shark-rhino mutant.

The spectacularly creative Clinton Boomer has done some additional material for GammaFinder, and we’re thrilled to link it here for folks who want Moar Weird!

Dhampir of the Gamma Wastes. Yep, post-apocalypse vampires.

Fist of the Gamma Star. Ready for Post-Apocalypse Martial Arts?

Footprints in the Burning Wasteland. Each blasphemous caress of your sorcery is, of course, a unique & terrible thing.

The Halidom City of Rho. It drifts along, some seven & a half miles above the scarred, broken wasteland stretched-out far beneath it, pushing effortlessly against the hellish winds of ash, glass, and the blood-thick dust of Empires.
An awesome setup for a whole campaign, or the most random of random encounters.

Omegamancy. Even after the world ends, some things are forbidden.

Reek of Corrupted Wasteland. You can smell what the Omegamancers are cooking!

I now depend on my Patreon for more of my income and support than I ever expected to. If you find any value in my blog posts or videos, I could use help with the Patreon. If you can spare a few bucks a month, it’s a huge help. If not, even just sharing and linking to my blogs, videos, and the Patreon itself is a huge help that just takes a moment of your time.

Thanks, everyone.



GammaFinder Mutantiary part 1 (Hammerderm)

So we introduced some quick and easy rules for GammaFinder, a post-apocalypse campaign hack for Starfinder, introduced the concept of the Unburned World and its relics (Halidom), and then gave some Halidom game rules. We’ve done one pretty standard theme for the setting, and two really weird ones.

Since GammaFinder is remaining popular so far, I thought it was time for a Mutantiary (like a Bestiary, but for weird mutant threats). Of course, these can be used for any Starfinder-compatible setting.

We start, with the hammerderm.

PA hammerderm

HAMMERDERM          CR 7          [COMBATANT]
XP 2,400 each
N Large Magical Beast
Init +4 Senses darkvision 60 ft., low-light vision, blindsight (vibration, 60 feet); Perception +20
DEFENSE     HP 125
EAC 17; KAC 20
Fort +11; Ref +11; Will +6
Defensive Abilities bounce off
Speed 40 ft. (burrow 40 ft., swim 20 ft.)
Melee bite +15 (2d6+11 S)
Ranged ping +18 (2d6+7 So, deafen)
Space 10 feet; Reach 5 feet
Offensive Abilities ping
Str +5; Dex +4; Con +0; Int -4; Wis +2; Cha +0
Skills Athletics +14, Intimidate +14
Languages none
Bounce Off (Ex) When an adjacent character makes an attack against a hammerderm and misses, but misses by less than 5, the attack literally bounces off the creature’s hide and reflects back at the attacker. The hammerderm makes an attack roll with a +13 bonus and, if the attack hits, it does its base damage (not including Specialization, ability modifiers, or special abilities) to the attacker.
Ping (Ex) The vibratory sonar of a hammerderm can be focused into a massive damaging “ping”. This counts as a ranged sonic attack with a 30 feet range increment and the deafen critical hit effect. It can fire through a material the hammerderm is currently burrowing or swimming through, but not other materials in contact with it — a hammerderm can ping through the earth it is digging through, but not through a concrete slap or boulder sitting on the earth. A target hit by the ping must make a DC 15 fortitude save or be deafened for 1d4 hours.

Hammerderms are much feared alpha predators most common in areas with long stretches of uninterrupted soil or sand, such as planes, prairies, deserts, river deltas, and beaches. They appear to be some horrific blend of shark and rhino, though its unclear if they are actually a product of mixing the dna of these creatures of if the Unburned World process that created them simply followed the from of those natural animals.

Hammerderms have massively powerful passive sonar, able to sense virbations in soil, water, and even the air making them almost impossible to sneak up on. They also possess an offensive sonic “ping,” a deafening bolt of focused sonic energy projected from an organ known as the tintabulum that runs along the front ridge of their head. If a hammerderm is killed without using any bludgeoning or sonic damage, the tintabulum can be extracted and sold (making up treasure equivalent to the appropriate amount for the hammerderm’s CR).

Hammerderms travel alone or in mated pairs, except when the moon is visible in the evening sky before nighttime, when they gather in small herds of 7-12. Hammerderms give live birth to 2-4 “peens,” which emerge fully capable of fending for themselves. A typical hammerderm is 12-15 feet long and weights around 5,000 lbs.

This is Just The Beginning

If the Mutantiary proves popular, we can do so much more with it! If you are looking for more GammaFinder-appropriate mutant critters right now, you can check out the grizzly boar and rattle-cat, which were designed for Really Wild West, but also work great in GammaFinder!


Want More GammaFinder?!
I now depend on my Patreon for more of my income and support than I ever expected to. If you find any value in my blog posts or videos, I could use help with the Patreon. If you can spare a few bucks a month, it’s a huge help. If not, even just sharing and linking to my blogs, videos, and the Patreon itself is a huge help that just takes a moment of your time.

Thanks, everyone.