Build interactive fiction worlds with AI game mastering. Persistent characters, real dice mechanics, and branching narrative — your stories, brought to life.
No credit card required. 1 world + 50 messages free.
See it in action
The forge is a wall of heat after the chill outside. Grond Ironhammer stands at his anvil — a mountain of a man with arms like tree trunks and a left hand made of articulated iron plates.
"Cold iron," he says simply. "Only thing that bites them proper."
I buy the cold iron dagger and head into the Dark Forest.
Initiative Roll
1d20+3 = 18 vs Shadow Creature 9
A shape materialises from the darkness — roughly humanoid but wrong. Too long, too thin, edges blurring like smoke. Your cold iron dagger hums faintly at your belt.
What do you do?
Platform
Understands world lore, stays in character, adapts to every player choice, and narrates combat outcomes. Not a chatbot — a storyteller.
Learn moreServer-side d20 rolls with modifiers, critical hits, and initiative. The AI never fakes results — every roll is real and dramatic.
Learn moreCustom classes per world with skill trees. Active abilities in combat, passive perks, point-buy attributes. Level up and unlock new powers.
Learn moreRarity-tiered items from Common to Legendary. 10 equipment slots, crafting recipes, loot tables, and NPC trading with a gold economy.
Learn moreCreator-defined quests with auto-tracking objectives. Main quests, side quests, quest chains, and rewards for completion.
Learn moreUnlock lore entries as you explore. Categorised encyclopedia covering locations, characters, factions, and history with completion tracking.
Learn moreBuild relationships with NPCs and factions on a -100 to +100 scale. High reputation unlocks secrets; low reputation means enemies.
Learn moreCreators schedule events: blood moons, festivals, invasions. Events modify the world dynamically and unlock special loot.
Learn moreUp to 4 players in one session. Turn-based combat with initiative. Shared narrative with individual actions. Invite friends with a link.
Learn moreInvite collaborators with granular permissions. Embed playable worlds on any website. Analytics, billing, and usage dashboard.
Learn moreConfigurable per world: respawn, ghost mode, Dark Souls drops, or permadeath. Resurrection mechanics included.
Everyone, Teen, Mature, or Adult. Age gates and content guardrails built in to keep every world appropriate.
When the AI presents options, interactive buttons appear. Players can click or type — their adventure, their way.
How it works
Define your world's lore, NPCs, locations, and rules in the visual World Builder. Set the tone, genre, and content rating.
Hit publish to make your world available in the directory. Share the link or embed it on your own site with one line of code.
Players create characters, roll dice, and explore your world. The AI game master handles narration, combat, and story branching.
Pricing
Players always play free. Creators subscribe to build and host worlds.
Perfect for trying things out.
For serious world builders.
For teams and publishers.
The first 50 studios to register get the Creator plan free forever. No catch — we want the builders who'll shape Grimscript with us.
Claim Your SpotLimited to 50 studios. Once they're gone, they're gone.
Start free. No credit card. No time limit.
Get Started