Castle VTT

A portable, offline-first DM and worldbuilding tool. Build worlds, run sessions, share with others and play together, all in one app. License: CC BY-NC 4.0 · Free to use Everything core works **without an account**. You only need one to play online, publish to the marketplace, or download other users' content. /images/general-media/1791564204_7DEx9r3t.webp Worldbuilding - Era Timeline: Split your world's history into eras on a timeline bar and move between them. Each era keeps its own map, pins, nested location maps and day-by-day timeline pins linked to cards and sessions. You can show the same city before the war and after it. - Templates & Packages: Every world is built on a template (D&D 5e is built in) and pulls content from packages. A package is a bundle of cards you can install into any world, link to other packages, or share on the marketplace. Custom templates are coming. - Codex: Schema-driven cards for NPCs, monsters, spells, items, locations and more. Every reference is a tappable link. Pin cards to the top, preview any card with a long press, and search by name, tag, category or text. - World Map: Pins, grid and scale, drawing, fog of war, and nested maps you can walk into (districts, dungeons, taverns). - Mind Map: An infinite canvas with linked nodes, workspaces, freehand drawing and undo/redo. /images/general-media/1791564252_TB7zwrCp.webp Running the Session - Second Screen: Give the table its own view. Pop out a window onto a second monitor, cast to a TV or projector, or project into every connected player's app. You choose how battle maps, images, cards and PDFs go out. Fog of war and hidden tokens stay hidden. - Battle Map: The session screen *is* the map, with the encounter panel and event log on top. It has layers, fog of war, AoE templates, 5e diagonal rules, creature-sized tokens, shapes and text, a DM-only layer, hidden tokens, movement trails for the round, and two maps joined into one. - Combat Tracker: Initiative, HP (with hit-dice rolls), conditions, turn order and an event log. - 3D Dice: Dice roll across the screen with named styles. Skills and saving throws roll from the character sheet with one tap. - Soundpad: Layered ambience with gapless loops, fades and ready-made soundpacks. - PDF Library: PDFs kept inside the world, opened in tabs and shareable with players. /images/general-media/1791564292_BnuuXJTS.webp Characters - Full 5e rules: Species, class, subclass, background and feats fold into one sheet. Each sense, resistance, proficiency, trait and always-prepared spell shows where it came from. Also covers multiclassing, spell slots, class resources (Rage, Bardic Inspiration, sorcery points…), weapon mastery, and short and long rests. - Character Builder: Pick species, class, subclass, background, ability scores, skills, starting equipment and feats from the SRD and any installed pack. - Level-Up: HP, proficiency bonus and hit dice update automatically. ASIs, feats, subclass and spell picks wait as pending choices. /images/general-media/1791564330_JBRRDNZ4.webp Playing Online - Online worlds: Put a world, package or character online and it stays the same on every device you sign in on. Players see the pictures even when the DM is offline. - Players: Join with an invite code, claim a character, move your own token on your turn, and send dice rolls to the DM's log. Shared cards update when the DM edits them. - .dmtz files: Export a world, package or character to one file and import it anywhere. No account or network needed. Content - SRD 5.2.1: Built in and works offline. - 19 one-tap packs: Tome of Beasts (1–3, 2023), Creature Codex, Monstrous Menagerie, Black Flag SRD, Deep Magic, Tome of Heroes, Vault of Magic, Tal'Dorei and more. - Ready-made worlds: 99 Devils of Uzrah's Palace (Shadowdark), Army of the Damned, The Cold Bounty, and soon our own campaign Aegis Act . - Marketplace: Publish worlds, templates, packages and characters as versioned snapshots with content previews. - Social: Profiles, follows, an activity feed, direct and group chats, and game listings with applications.

Codex Cryptica is an AI-assisted worldbuilding and campaign management tool built around a living knowledge graph instead of a folder of loose documents. Every character, faction, location, and event you create becomes a linked entity, so your world stays connected and explorable as it grows. Genre-agnostic across fantasy, sci-fi, cyberpunk, horror, post-apocalyptic, western, steampunk, and more.

One Realm is an AI-assisted campaign workspace and virtual tabletop built for groups that want to play tomorrow—not spend the week preparing. It turns adventures, source material, and campaign notes into an organized, playable world, helping GMs complete work that might otherwise take hours or days in a matter of minutes. Characters, locations, encounters, maps, relationships, and story events are automatically organized and connected. From there, the GM can prepare scenes, create artwork, manage characters, and run the game through the integrated virtual tabletop. Because everything shares the same campaign context, preparation flows directly into play without rebuilding the session across multiple tools.

Werewolf: The Apocalypse is a gothic-punk tabletop roleplaying game of environmental and spiritual horror, in which players take on Garou, shapeshifting werewolves who fight to protect Gaia from destruction, greed and corruption. It was created by Mark Rein-Hagen and first published by White Wolf in 1992, with a second edition in 1994, a Revised Edition in 2000 and a 20th Anniversary Edition from Onyx Path Publishing. The Fifth Edition, published by Renegade Game Studios and released in August 2023, is a 300-page-plus hardcover for ages 18 and up that uses the 5th edition Storyteller system. It is described as a re-imagining of the game and not a continuation of earlier editions. The system directly evolved from the original Werewolf: The Apocalypse (1992), and it is part of the World of Darkness line. Description Players take on werewolves who see themselves as the planet's immune system, hunting the supernatural forces that would bring about the Apocalypse. In the Fifth Edition, a werewolf is seeking radical solutions to an environmental apocalypse and the world's injustices. The Game Master (GM), called the Storyteller, runs a chronicle in the World of Darkness, and the book covers character creation and guiding a troupe. The game asks a table to engage with heavy themes. The book carries a mature content warning for violence, sexual themes and strong language, and first-edition reviewers noted that its mythology can be a lot to take in. It suits groups who want a story of rage, loss and ecological dread more than a tactical monster hunt.

Turn your table into a hacker movie. GM Terminal Kit lets you build a fake retro computer, with files, passwords, email, programs, alarms and glitches, then hand the keyboard to your players. It's one file that runs in your browser, even offline. Originally designed to be a prop for TTRPG's, Murder Mystery Parties or other in person events, GM Terminal Kit has gone on to adopt a number of features which can make for an entertaining terminal-based standalone game. What you can build - Clues hidden in files and folders, password locks, files that self-destruct - Accounts with mail that arrives mid-game - Events: when players read a file or type a phrase, new mail appears, a character starts typing, or a countdown begins -Sound effects and a robotic voice, made right in the browser -Screen glitch, shake and flash -12 looks, including 80s green CRT, DOS PC, military teletype and cyberpunk -Questions with branching answers -Animated GIFs that play as ASCII art -An event map that shows how it all connects, and Run now to test any script -Export for players: one file you can send, with locked content encrypted Comes with Kestrel Station, a short sample game that shows off every feature. Pay what you want. Want to see how a full game is put together? For $2 you also get the Thornfield Terminal source: the complete scenario to open in the kit, plus a walkthrough. Play Thornfield free on this page. If you make something with it, a credit is always appreciated: Made with GM Terminal Kit by RomanSerius. Thornfield Terminal A guest login to a research lab's computer, 1989. A friendly message from someone called Pan. Evidence that needs to get out. Read files, crack passwords, dig up deleted mail, and decide who to trust. Short, with two endings. Turn your sound on. Your progress saves in your browser. Made with GM Terminal Kit, free to download, so you can build your own. Want to see how Thornfield works inside? The source is $2 on the kit's page. Please let me know if you find any glitches or have any questions!

SpiralWorlds is a free fantasy-Earth tabletop RPG resource set around 1454, combining real-world geography, mythology and folklore with game-ready monsters, gods, NPCs, maps, locations, spells and character material. It is designed as a browsable campaign reference for GMs and players, with material spanning modern and legacy D&D-style rules where appropriate.