SOJEN
Build Living, Breathing Sandbox Campaigns for Your Indie RPG
Create interconnected factions, dynamic locations, and emergent storylines for any indie RPG system—from Blades in the Dark to Powered by the Apocalypse
Early Access Code: buildworlds2026
Steps to Success
Define your setting's core factions and their conflicting goals
Map out key locations and establish relationship networks
Generate NPCs and populate your world with dynamic elements
Export your sandbox with system-specific mechanics and run your campaign
Suggested Style Prompt
Use this prompt in Sojen to achieve the perfect style for your creation:
Create a gritty urban fantasy sandbox for Blades in the Dark with noir aesthetics, featuring industrial revolution technology, occult conspiracies, and morally gray factions competing for control of a decaying port city
Style Examples
How It Works
SOJEN empowers game masters to build rich sandbox campaign settings through an intuitive world-building engine designed for indie RPG systems. Create detailed factions with conflicting goals, populate locations with memorable NPCs, and establish relationship webs that drive emergent gameplay. Whether you're running Fate, Forged in the Dark, or PbtA games, SOJEN helps you build living worlds where player choices matter—complete with faction clocks, front management, and dynamic event generators. Generate a complete sandbox setting in under an hour with full creative control over themes, tone, and system-specific mechanics.
