The Ultimate DM Prep Symphony

Master Your TTRPG Prep.
Less Time Planning. More Time Playing.

The first campaign manager designed to synthesize three industry-standard prep methodologies into a single, cohesive workflow. Synced across all your devices, built for Game Masters who demand zero friction.

Try Active Alpha (gm.averykarlin.org) →
Gamemaster Icon Gamemaster Assistant — Campaign Prep
Standard Duet Solo
Campaign Prep AI Features Players

Secrets & Clues

Step 3 of 8
Shoot for 10 Secrets 3 / 10

Secrets are units of lore disconnected from specific paths. Click a secret to "reveal" it to players.

The cult of the Bleeding Star has replaced the High Priest with a doppelganger.
The ancient drakespire ruins contain an inactive portal keyed to the Plane of Fire.
Lord Vaelen paid the goblin warband to stage the caravan raid to frame his brother.

Factions & Fronts

Faction Progress Tracker
Active Factions 2 / 4

Clocks represent the impending schemes of campaign fronts. Click a clock to tick it forward.

The Obsidian Hand

Scheme: Resurrecting the Lich King

Iron Crow Guild

Scheme: Subverting the Port Taxes

Vivify Prose generator

PRO Feature

Need an evocative, campaign-grounded description of a room, NPC, or magic item on the fly? Let Vivify generate it.

CONTEXT-AWARE PROMPT

Generate a scene description for the Bleeding Star Temple. Mention the High Priest behaving strangely.

Click "Vivify Scene" above to stream an AI description based on your campaign's active facts, secrets, and NPCs...

Real-time Player Projections

Real-time Sync

Game Master Dashboard

Roster & Disclosures Sync Online
Fallen Drakespire
The Doppelganger
The Goblin Raid Plan

Player Mode Viewport

Player Journal Read Only
Fantastic Location: [Redacted by GM]
NPC: [Redacted by GM]

Toggling the GM buttons to "Party" instantly reveals details here in real-time.

Symphony of the Three Books

We didn't invent these workflows; we just unified them. Gamemaster Assistant binds three award-winning methodologies together so they reinforce one another perfectly during play.

01

Lazy Dungeon Master

Build your prep around Mike Shea's legendary 8-step framework. Focus strictly on secrets, monster stats, fantastic locations, and key NPCs. Stay out of over-planning traps.

02

Collaborative Campaign

Establish safety guidelines (lines/veils), compile shared world facts, structure conflicts, and track faction clock progressions generated together during Session Zero.

03

Proactive Roleplaying

Focus on PC-driven goals. Map character ambitions directly into the prep panel, allowing you to tie upcoming secrets and locations back to player motivation.

12 Structured Campaign Editor Sections
World Facts Setting Facts Factions Faction Clocks Conflicts PC Goals Potential Scenes Secrets & Clues Fantastic Locations NPCs Monsters Magic Items

The Tableside Engine

Beyond methodology, Gamemaster Assistant packs the ultimate tableside utility belt. Designed to run your sessions in real-time, keep your data isolated, and completely prevent planning fatigue.

Tableside Helpers

Roll instantly on custom tables, trigger inline NPC trait inspires, and browse structured NPC logs (including stats, motives, and visual details) in a single click.

Encounter Budgets

Calculate XP thresholds and combat difficulty ratings (Trivial, Easy, Medium, Hard, Deadly) live. Balanced dynamically for your party's level and size.

1.5s Auto-Save

Edit notes on your laptop and read them live on your phone. Auto-saves to Google Cloud Firestore exactly 1.5 seconds after you stop typing for seamless multi-device sync.

Complete Portability

Your campaign belongs to you. Export and import entire campaign templates as raw JSON files for complete offline ownership, backups, and zero platform lock-in.

Real-time Sync

Redacted Projections. Zero Player Friction.

Share an unguessable read-only link with your players. No accounts required for them. Your GM dashboard allows you to keep campaign entities hidden, reveal them to the party, or customise per-player reveals on the fly.

Sticky Reveals

Once you reveal a secret, location, or faction to a player, it locks onto their live projection document permanently.

Narration Mentions

Type a session narrative feed entry. Mentions like @Lord Vaelen automatically unlock the corresponding NPC in the players' journals.

GM Secret Note
NPC Lore: Priest Vaelen is secretly dead, replaced by a shape-changing doppelganger.
Capability Redactor
Removes structural secrets and replaces with cryptographic hashes on player-accessible docs.
Player Live Journal
NPC Lore: Priest Vaelen is .

Unleash the Pro MultiversePRO

Upgrade your prep with custom, campaign-grounded LLM inference APIs. Gated behind a simple Pro waitlist, built to breathe immediate life into empty spaces at your table.

01

Vivify Narrative

Stream campaign-aware prose for places, characters, rumors, and magic-item flavor text instantly. Auto-persists your 50 most recent generations for quick offline retrieval.

02

Sheet Parser

Drag and drop a PDF character sheet or character screenshot, and watch the system instantly parse and create structural database entries for stats and gear.

03

Trait Inspires

Stuck on personality traits, hooks, or secrets? Instantly generate themed NPC trait lists that align with faction priorities and local environments.

04

Name Generator

Generate themed NPC name lists (Elven, Dwarven, Goblincraft, High Fantasy) tailored live to your campaign's environments and faction cultures in a single tap.

Simple, Transparent Access

No paywalls for essential prep tools. Upgrade only when you need deep generative assistance.

Standard Prep

$0/forever
  • 8-Step Lazy DM Prep
  • Collaborative worldbuilder
  • Proactive Goal Tracker
  • Real-time synced database
  • Free Player Projections
Get Started Free

Master Pro

$3.99/month
  • Everything in Standard
  • Unlimited Vivify prose generations
  • AI Character Sheet PDF Parser
  • Context-grounded trait generators
  • Priority access to new AI models
Join Waitlist

Join the Gamemaster Waitlist

Pro membership is currently invite-only. Enter your email below to reserve your spot. We will email you the moment slots open up in your region.

Welcome to the Table, Adventurer!

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