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These games are similar to Radio Waves ...
The Wretched   - Survive alone in the black
Residents of Nowhere   - Factions for Liminal Horror to terrorize your weird road trip
Curse of the Alta Silva   - Can you survive the night?
Generational: A Story about Stories   - A world-building game of storytelling through the lives of historical and legendary characters.
Dead Air   - A Game about Radio Activity
The Lost Isle   - A mysterious island pointcrawl
Haxen   - A solo post-apocalypse RPG
Cairn [Edición en español]   - Explora un bosque sombrío y misterioso lleno de gente extraña, tesoros ocultos y monstruosidades indescriptibles.
Checkerbeak   - A supplement for MÖRK BORG created during the OSR Supplement Jam hosted by Taylor Lane in March 2022.
Monster Hunter   - A Solo Journaling Game in a weird west world.
One Page Left   - Create a Killer, Escape the Mansion
Gloom + Sanctuary   - Survive yesterday's apocalypse
Radio Waves is similar to...
Residents of Nowhere   - Factions for Liminal Horror to terrorize your weird road trip
Dead Air   - A Game about Radio Activity
Checkerbeak   - A supplement for MÖRK BORG created during the OSR Supplement Jam hosted by Taylor Lane in March 2022.
Tea for Two   - A game about talking, listening, and tea.
Gloom + Sanctuary   - Survive yesterday's apocalypse
Coded Comms   - System agnostic code based on real Amateur radio and Morse Code.
Depths   - Modo solitario para Exhume RPG
SRD -  Mark of the odd [es]   - SRD en español de la Mark of the odd
Fallen [Hoja de personaje]   - Hoja de personaje diseñada por Fran Vidal
Gesta orbital   - A Nano Solo RPG About Space Survival
24XX SRD   - Un SRD para crear juegos tipo Lo-Fi Sci-Fi
Firelights Kit de Creador y SRD   - Crea tu propio contenido basado en Firelights
If you like Factions check out...
For the Dungeon!   - Play the minions, not the heroes. An improv comedy RPG about the misfortunes of a career in dungeon security.
The Tattoopunk Antebible   - A punk anti-bible for your Tattoopunk world
Florilegium Ex Miscellanea   - a little book of many magics
Little Old Lady Investigator (A Troika! Background)   - A background for #TroikaJam
Sworn In Blood   - a supplement for Vampires & Claymores
Turn   - a slice-of-life, rural supernatural RPG about shapeshifters in small towns
Patreon Papers 001: The Fighter & The Sage   - Two classes for the TRPG Ryuutama
INFIL/EXFIL   - Perilious transport options for the FIST RPG.
Seven-petals   - several psionic specialties
Of Arcane Origins   - class abilities for brighthammer rpg
Patreon Papers 002: Demons and Their Knives   - Three moves for the TRPG Dungeon World
Heroic Fates: Complete (5e)   - Mechanic for collaborative character progression in 5e.
If you like ZER0DAG! check out...
The perpetual broth   - A short adventure Pop-Up zine for DURF
Session Zero: Complete Edition   - A Collected Edition of all three Session Zero games.
BECOME ONE   - What is the cost of memory?
What Dust Remains   - Build your legacy - but at what cost?
Ink Transference   - A play by mail game where you learn about humans and emotions
The Wind Began to Howl   - A zero prep Forged in the Dark song fiction RPG based on Bob Dylan's All Along the Watchtower.
EXUVIAE: Relics of House Dragonfly   - Horror-noir one-shots with a pack of cards and no prep
Roll for Shoelaces Micro-RPG   - Zero-prep one-shot tabletop micro-rpg system
Iron Edda Accelerated   - Power. Cost. Sacrifice.
MÍNIMO RPG   - A free, easy to learn, pocket size, minimalist RPG.
Warlock Joe's Dungeon for Babies   - A zero-prep, two-page, five-room dungeon for level 1 characters
The Adventurer   - A solo story writing game