Every Villain
Every Session
Every Player
Organized for YOU

Free for your players. Built for the DM who runs the world.

The definitive toolkit for Dungeon Masters who weave intricate, D&D 5e campaigns. Manage lore, encounters, NPCs and world state without breaking immersion.

Start Your Campaign See How It Works
The Nemesis Codex enemy roster: six tracked villains as cards with portrait busts, threat ranks from Minion to Overlord, each showing HP and AC, with one marked defeated.

A full virtual tabletop, built in

The campaign tools come with a full battle map. Fog of war, dynamic lighting, walls and doors that stop tokens, and tokens players drag from their own phones while you referee the move.

A player's character sheet on an iPhone in Nemesis Codex, showing armor class, hit points, speed and ability scores.

Each player's sheet on their own phone

The Nemesis Codex DM map view: a dungeon battle map with fog of war, lit and shadowed rooms, and tokens, alongside the DM's tools.

The DM's map view

A player's canvas in Nemesis Codex: the shared map open beside their character panels, inventory and other tabs as draggable windows.

A player's canvas on their own computer

The Nemesis Codex player TV view: a full-screen battle map with fog of war and tokens and almost no interface.

The player view, full screen on a TV

Villain Tracker

Monitor threat levels, intricate plots and minion networks. Never lose track of your antagonist's next move in the shadows.

Real-Time Sync

Changes to your grimoire reflect instantly across your devices. Keep the session flowing without frantic note-checking.

Spell Listener

Index and cross-reference spells and arcane lore during rapid combat. Search that feels like wielding true magic.

Built by a Dungeon Master, for Dungeon Masters

A Complete Grimoire

Character Management

Track PC stats, conditions and passive perception at a glance.

Initiative Tracker

Fluid combat sequencing with automated turn reminders.

Paste & Go Import

Paste any monster or spell from the SRD, your notes, or any stat block you've got, and Codex builds the full, editable entry.

Campaign Calendar

Manage time-tracking, travel and custom world events.

Encounter Builder

Balance CR ratings and spawn minions on the fly.

NPC & Faction Tracker

Map out loyalties, secrets and interconnected relationships.

Is Nemesis Codex right for your table?

VTTs handle the map. Campaign tools handle the lore. Nemesis Codex does both in one place, light enough to run a whole session from your phone, whether your table shares a room or plays online.

Nemesis Codex is built for

  • Tables that play in person, with the map on a TV and everyone's sheet on their own phone
  • DMs who want the campaign tools and the map in one place instead of two apps
  • Running the whole session off a phone or a laptop
  • Players joining free on their own devices, no per-seat cost, one person pays
  • Groups playing online, or splitting between in-person and remote

Online play works today. Players move their own tokens while you referee, with fog, dynamic lighting, and a spotlight camera streaming to their screens. It's built and tested across devices, and actively being developed.

Where other tools do it better

  • Foundry runs on your own server with a one-time license, so your games don't depend on my company existing. Codex is hosted, so you're trusting me to stay running.
  • Neither Foundry nor Roll20 nor Codex is the answer for voice. Codex has no built-in voice or video at all, so you're on Discord alongside it. Roll20 has voice and video built in.

Choose Your Path

Free for your players. Built for the Dungeon Master who runs the world.

Monthly Rite

$8 / month

Cancel anytime.

  • Unlimited villains, NPCs & factions
  • Encounter builder + live initiative tracker
  • Monster codex, spell & item libraries
  • Your players join free on their phones
Best Value

Yearly Pact

$60 / year

Save $36 a year, over 4 months free

  • Everything in the Monthly Rite
  • Run multiple campaign worlds
  • Session recaps & the live spell listener
  • World calendar, lore & relationship maps
  • Homebrew races, classes, spells & items

Eternal Ascendance

$150

Pay once. Reign forever.

  • Everything, forever. No subscription
  • Every future update included
  • Early access to new features
  • A founder’s badge on your worlds
Players always join free No per-player fees, ever Built for the table, not just the screen

Already have a beta code? Open the Codex, create your account, then enter your code there to turn it on. You only enter the code once.

Enter the Codex

Common Questions

Do my players have to pay?

Never. Players get free access on their phones to their own character sheet, inventory, spells and notes. Only the Dungeon Master running the world needs a plan.

Can I cancel anytime?

Yes. The monthly and yearly plans cancel whenever you like from your account, and you keep full access through the end of the period you’ve paid for.

How does lifetime access work?

One payment and Nemesis Codex is yours for good, with every future update included and no recurring charge ever.

What happens to my worlds if I stop paying?

Your campaigns are never deleted. Your data stays safe in the cloud, and you can pick a plan back up anytime to keep editing right where you left off.