Alcaphaz Review — ESP Brain System — a paranormal investigation TTRPG on a mysterious island where corporations experiment on humans and create ESPers with extraordinary powers

Alcaphaz is a full paranormal investigation tabletop RPG set on a mysterious island — a deliberate fusion of Okinawa, New Zealand, New Caledonia, and Hawaii. The central concept is ESPertom: a pharmaceutical compound created by Zoon Pharmaceuticals that triggers latent psychic abilities, transforming test subjects into ESPers. Players are ESPers navigating a world controlled by Zoon Pharmaceuticals (35% influence), Noos Corporation (40%, military-partnered rival), OASIS Technologies (surveillance), The Military (55%, enforcing the embargo), The Escapees/Awakened (15%), and Local Families. The resolution system is the ESP Brain System: characters have three attributes (Physical, Mental, Social), each with dual bands. Every roll uses 2D20 — a Left Brain die and a Right Brain die — one visible to the player, one hidden (visible only to the GM). Results are graded: Critical Success (natural 1), Success, Partial Success, Fail + Boon, Failure, Critical Failure (natural 20). When both dice show the same number, a Sync Point is earned. Characters choose Handedness: Right-Handed, Left-Handed, or Ambidextrous. 24 Skills cover Physical, Mental, Social, and Hybrid types. The ESP Powers compendium contains 30+ powers across 6 disciplines: Telepathy, Psychometry, Clairvoyance, Telekinesis, Precognition, and Retrocognition. The full site includes: Rules (with interactive dice roller), World (island map, factions), Powers (filterable compendium), Downloads, Community, Solo Adventure, Character Builder, Bestiary, and Sitemap.

TTRPG players who love paranormal horror, body horror, tropical noir, and original dice mechanics with deep lore

Dual-hemisphere 2D20 ESP Brain System is mechanically unique — no other TTRPG uses simultaneous hidden-die resolution tied to brain lateralisation

Joachim Mouffron is a French fullstack developer, game designer, and creative technologist. Alcaphaz is his most mechanically ambitious and world-complete TTRPG, representing years of development across the full tabletop stack: rules system, world lore, faction politics, ESP powers compendium, bestiary, character builder, solo adventure, and community resources. His prior works include Nowhere Land (Drop System), 3B (d60 system), and PolyAlien.

Alcaphaz is a free, openly developed TTRPG and world-building project by Joachim Mouffron, who has a fully verifiable public identity and an extensive body of published design work. No payment is required anywhere on the site. The rules, powers, world lore, character builder, and solo adventure are all free. The project has been in active development across multiple years with consistent quality. Zero scam risk.

TTRPG players who love: paranormal investigation games (Delta Green, Call of Cthulhu); original mechanical design that goes beyond d20; body horror and tropical noir aesthetics; games where powers have genuine costs; immersive world-building with factional complexity.

Completely free. Every section of the site — rules, world, powers compendium, character builder, solo adventure, bestiary — is accessible without payment or registration.