A Fiction-First Tabletop Roleplaying Expansion & 10 Sci-Fi & Cosmic Frontiers Settings
Available in: Paperback · Kindle
The Sci-Fi & Cosmic Frontiers Companion propels the D6 Storyteller engine into the far reaches of speculative fiction: from the cramped corridors of a generation ship three centuries into its voyage to the impossible interior of a star-enclosing Dyson Sphere inhabited by millions of alien species.
Science fiction demands mechanics that feel grounded in the logic of their world. This companion delivers ten settings where resource management, environmental hazards, and the consequences of advanced technology become active elements of play. Running out of oxygen is not just flavor: it changes your position. Overheating your mech armor mid-battle is not just description: it costs you condition slots.
Each of the ten settings in this companion includes full world lore, a unique genre mechanic, three ready-to-play character archetypes built for the setting’s specific challenges, a genre-specific condition palette, and a complete starter scenario seed. Whether your group wants to play corporate whistleblowers on a billed-by-the-breath moon base, guerrilla survivors fighting alien assimilation, or transhuman travelers managing digital corruption across the cosmos, this companion provides the framework.
The Sci-Fi & Cosmic Frontiers Companion is fully compatible with the D6 Storyteller Core Rulebook and all companion volumes, allowing groups to blend settings and mechanics across genres.
Each setting is a complete playable world with its own tone, mechanic, archetypes, and starter scenario.
A centuries-long journey toward a distant star system where social castes have degraded into tribal factions aboard the ship.
Mechanic: System Fatigue & Enclosure Stress: Life support systems decay over generations, creating hull stress and oxygen rationing mechanics.
Humanity survives in junkyard megastructures surrounding a dead megacity, rebuilding themselves from scavenged android parts.
Mechanic: Part Degradation & Scrap Modding: Scavenged cybernetics provide instant abilities but degrade after every three critical rolls.
Utopian solar-powered bio-cities defending their ecological harmony against corporate scavenger fleets.
Mechanic: Harmony & Clean Energy: Utilizing clean energy grants momentum bonuses, while polluting actions incur community penalties.
Human survivors wage guerrilla war against an encroaching alien bio-hive that assimilates organic life.
Mechanic: Pheromone Signal & Contagion: Exposure to swarm spores tracks assimilation risk; high signal alerts local bio-constructs.
Elite pilots operate massive walking war machines defending humanity's final fortress cities against kaiju.
Mechanic: Heat Sync & Mech Armor: Mechs absorb heavy conditions into armor slots; overheating weapons forces manual cooling rounds.
Starships navigate non-Euclidean hyperspace warp corridors where space and reality warp based on thought.
Mechanic: Warp Flux & Perceptual Drift: Navigating hyperspace requires Mind checks; failure distorts ship geometry and perception.
An industrial moon base run entirely by rival mega-corporations where every breath of oxygen is billed to employee accounts.
Mechanic: Credit Debt & Oxygen Bill: Performing actions consumes corporate credits; negative credit balances restrict access to habitats.
Explorers venture into dead precursor alien megastructures to scavenge godlike, incomprehensible technology.
Mechanic: Precursor Artifact Resonance: Activating alien relics produces unpredictable reality-warping effects on rolls of 1.
Millions of alien species live on the interior surface of a colossal star-enclosing Dyson Sphere.
Mechanic: Gravity Shift & Solar Flare: Gravity varies by sphere sector; solar flares disrupt communication and electronic systems.
Digital consciousnesses uploaded into synthetic bodies travel the cosmos while fighting digital virus corruption.
Mechanic: Mind Backup & Corruption Rate: Death triggers restoration from cloud backup, but corruption reduces maximum condition slots.
D6 Storyteller: Sci-Fi & Cosmic Frontiers Companion is a sci-fi volume in the D6 Storyteller series by Alex Merced. It contains ten complete settings, each with a unique mechanic, character archetypes, a condition palette, and a starter scenario.
Each companion contains a summary of the core mechanics sufficient to begin play, but the D6 Storyteller Core Rulebook provides the full rules reference and Storyteller guidance. New groups are encouraged to start with the Core Rulebook.
D6 Storyteller: Sci-Fi & Cosmic Frontiers Companion contains ten complete, ready-to-play settings, each with its own lore, unique mechanic, archetypes, condition palette, and starter scenario.
Yes. The D6 Storyteller engine is modular. Any setting-specific mechanic can be imported into other worlds, and lore from multiple companions can be combined freely.