Vast Grimm Science Fiction;Horror;Survival;Dystopian;Space-Western;Old-School Renaissance (OSR);Rules Lite;Low Prep;Quick-Play;Bleak;Metal
At‑a‑glance: OSR/NSR lineage • d20+d6 saves • 3–5 + GM • Low prep • Rules‑lite • 2–3h sessions
Theme and Setting
Legions of survivors cling to derelict stations and dead worlds as the parasitic würms spread, twisting bodies and ecosystems into nightmare forms. The ‘verse is bleak, industrial, and merciless—hope survives as rumors, black-market relics, and stubborn crews who refuse to quit.Core Mechanics and Rules
Rules draw from Mörk Borg’s ultra‑lean engine: ability saves instead of attack rolls, swingy damage, and equipment that matters. Character creation is fast and classless; gear and risks define play more than builds. Tables, generators, and prompts speed up prep and make failure states interesting, not stalled.What Makes It Unique
Vast Grimm leans hard into sci‑fi body horror: contamination, infestation, and desperate choices under pressure. The tone is loud and abrasive by design—layout and procedures reinforce urgency and danger. You’ll scavenge, jury‑rig, and burn resources to see another sunrise.Target Audience and Player Experience
Great for groups that want lethal, punchy sessions with minimal rules overhead. If your table enjoys OSR‑style problem solving, grimy starship drama, and survival under mounting costs, this hits the spot. Less ideal for players seeking long build paths or heroic power curves.
