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Mammoth Island is a game design duo consisting of brothers Mathew Iantorno and Michael Iantorno. We design adventures, rules, and resources for tabletop roleplaying games.
Thumbledore's Tiny Dungeons #8
Ouroboros - WIP
Thumbledore's Tiny Dungeons #12
Stakes and Silver
Thumbledore's Tiny Dungeons #5
The Leech- Tendencies: Spirits and Glamour Playbook
Inhuman Resources: Team-Building Activities for Humans
The Hidden Shrine of  the Salmon-Men
The Last Voyage of the Shadow
Untamed and Unbound
Visit the Wild Decaying Island of Bermoothes
Thumbledore's Tiny Dungeons #4
Thumbledore's Tiny Dungeons #7
Non-Fungible Tentacles
Gear, Overhauled
rodent: original sin
Thumbledore's Tiny Dungeons #6
One Page Dungeon Anthology
The Honed- Tendencies: Spirits and Glamour Playbook
Finesse and Might
Thumbledore's Tiny Dungeons #1
Visit the Weird Decaying City of Moth Hovel
Wizardry and Bureaucracy
FIST: Hecatoncheires
Legerdemain
Oh No
The Undercroft of Saint Amis
GREMLINS
Thumbledore's Tiny Dungeons #2
The Acolyte
Thumbledore's Tiny Dungeons #9
Mammoth Island Adventure Club
This Crypt Will Be Your Tomb
Thumbledore's Tiny Dungeons #11
For the Hoard
Little Bones
Thumbledore's Tiny Dungeons #10
The Wanderer's Guide to the Wilds
Kith and Kin
Darling Amongst the Dust
Guests for Yazeba’s B&B
Phylactery
Thumbledore's Tiny Dungeons #3
Somebody taught the axolotl how to talk
If you like A Gathering Storm - Iconic Edition check out...
/dia   - a solo lyric game.
Caltrop Core v1.2   - An Introductory TTRPG Design SRD
Dinos for Quest - Volume I   - An NPC booklet for Quest
Curious Comrades Vol. I   - Odd NPCs for Mausritter.
In the Shadow of Tower Silveraxe   - Fantasy Roleplaying Adventure Module
Branches   - Climb a fantastical tree in search of adventure and develop your powers the longer you stay climbing.
The Howling Caverns   - A D&D 5e horror adventure for 3-5 1st level characters
1-6 Oozes in the Dark   - A print-and-play micro-module for 5e
Dead Belt - A Solo RPG for Space Cowboys   - Scavenge, struggle, and get paid on the gasping frontier.
FiviE   - Compatible with games
Where the Wheat Grows Tall   - An old school faery adventure for low level characters
Apprentice Quest   - Freshman at Wizard College go on a quest!
If you like Reunited and it Feels... check out...
The Bonds That Tie Us   - A GMless TTRPG about relationships
galactic 2e   - a game of rebellion, relationships, and war among the stars.
Kintsugi   - A simple role-playing game where failure only makes you stronger.
HOUSE PARTY   - A Troika Adventure Module
A Long Night In The Mech Bay   - A 2 Player TTRPG about Relationships Reforged in Conflict
The Selkie Envoy: An Ironsworn Adventure   - An Ironsworn adventure of ice and peril
Riding the Ley Line   - a reflective mini-LARP about commuting on public transit
Heirlooms   - a Lost and Found game
The One   - A solo tabletop RPG about relationships in a weird fantasy city.
Loss   - Something is always lost.
Map Pieces   - maps to get lost by
it's been a long, long time   - a two-player game about a reunion.
If you like Will's Weird and Wonderful Weapons check out...
Oneironauts 2   - More dreams and nightmares for Troika!
GUN COWBOY   - A journaling game of dead outlaws.
Penicillin Issue #1   - Weird RPG Zine
Prismot!: A Troikawave Zine, Issue 1   - Or: How to run a vaporwave campaign in Troika!
The Desert of Yondo   - Part of "An Atlas"
Dancers in the Dreaming City   - Simple Moorcockian fantasy RPG
At the Monarch's Gate   - A game about the weapons we carry and the stories they hold.
What's So Cool About Mighty Thews?   - A Sword & Sandals RPG.
What's So Off About This Small Town?   - A micro-rpg about weird and dark small towns
Hey!  You're A Cool Super *-ing Robot!   - a small rpg about awesome robots
Let's Steal A Spaceship! and Way To Crash Genius!   - Small adventures for "What's So Cool About Outer Space?"
FOUND FOOTAGE: A Pamphlet Bestiary for Liminal Horror   - 10 new monsters for Liminal Horror