Build Maps. Run Campaigns. Play Together.
A tabletop RPG campaign, map and session app for building adventures, running live games and playing together on a local network or over the internet. The app does the rules math and the bookkeeping; players make the decisions and roll their own dice; the GM stays in control.
Only the GM pays. Players join free. Player Edition: Free · Full Toolkit: $19.99 USD, one-time · Prison Escape adventure: $0.99 USD
Available now on Google Play. Coming to Steam on October 30th. More updates and adventures coming soon to Game Master.
Game Master is one app. Everyone starts with the free Player Edition. The GM who builds and runs the game unlocks the Full Toolkit inside the same app; there is no separate GM program to download.
Free
Everything a player needs to join a game and play.
Players never need the Full Toolkit to join a game.
$19.99 USD one-time purchase
Everything in the Player Edition, plus the tools to build and run games.
Unlocks inside the same app. No subscription.
| Feature | Player Edition Free | Full Toolkit $19.99 USD, one-time |
|---|---|---|
| Join games (local network and internet) | Included | Included |
| Play your character and roll your own dice | Included | Included |
| My Characters | Included | Included |
| Tabletop Mode | Included | Included |
| Campaigns and Quick Start adventures | Not included | Included |
| Map Maker | Not included | Included |
| Content editors | Not included | Included |
| Encounters | Not included | Included |
| Run sessions as the GM | Not included | Included |
| Host games (local network and internet) | Not included | Included |
$0.99 USD one-time purchase
A three-part level 1 adventure for 2–4 players. Goblins bought the party and plan to eat them: break out of the cells, recover your gear, free a thief named Snails, slip or fight through the fortress, and face the Buyer outside the walls. Every escape has stealth, trickery and combat options.
For the GM: running it needs the Full Toolkit. Players who join need nothing.
The Full Toolkit is $19.99 USD and the Prison Escape adventure $0.99 USD on both stores: as DLC on Steam (Windows) and as in-app purchases on Google Play (Android).
No. Players join and play with the free Player Edition. Only the GM who builds and runs the game needs the Full Toolkit.
No. The Full Toolkit is a one-time purchase.
No. The Full Toolkit unlocks the GM features inside the Game Master app you already have.
No. Each store sells and unlocks its own copy, so a purchase on Steam does not unlock Google Play, or the other way around.
An optional $0.99 USD adventure DLC for the GM: "Escape from Greystone Keep". The GM needs the Full Toolkit to run it; players join free as always.
Game Master is available now on Google Play. Game Master is coming to Steam on October 30th.
Ground, Terrain, Decoration, Objects and Logic layers. Walls, doors, furniture, traps, water, ice, weather and indoor areas that play the way they look. Test any map before a session.
Story, locations, maps, characters, NPCs, monsters, encounters, items and rewards, all connected. Start blank or from the built-in adventure.
Free Play exploration, prepared encounters, initiative, combat, messages and the Session Log, from one screen. Pause and resume exactly where you left off.
Host on Windows and let players join from their phones, tablets or PCs: on the same local network, or from anywhere with an eight-character Join Code. Reconnects after Wi-Fi or mobile data drops. No accounts.
Modifiers, hit or miss, damage, resistances, healing, HP, initiative and conditions are worked out and applied. Players still roll their own dice.
Each player sees what their character can see. Remembered areas, darkness and shared party vision; the GM reveals or hides areas, objects and creatures.
Control monsters and NPCs, run several locations at once, and override hits, damage, saves, HP and turn order after the fact. Every override is logged.
MOVE, ATTACK, SPELL, ITEM, SEARCH, INTERACT, TALK. First tap previews, second tap confirms. Portrait works; landscape is recommended.
A searchable manual with annotated screenshots, Quick Starts for GMs and players, and a Glossary of tabletop terms in plain words.
Game Master includes its rules, help system, glossary, creatures, items and game reference. Explore the entire library online before you play.
Learn how to build and run your first campaign. 22 chapters with annotated screenshots.
RulesRead the complete Game Master rules: dice, characters, combat, conditions, magic and GM rules.
Game LibraryBrowse all included creatures, items, weapons, armor and equipment: 176 creatures and 129 items.
GlossaryLook up AC, HP, CR, DC, initiative and other tabletop terminology. 71 terms.
Map Maker GuideLearn how to build and test maps.
Multiplayer GuideLearn how local network and internet play work, including Join Codes.
Choose a weapon or spell, see valid targets with range and modifiers, pick a target and roll. Hit or miss is resolved, damage is rolled, resistances apply, HP updates and it is all logged. Players choose every move, target and action.
Maps, monsters and encounters, or the built-in starter.
Shared on the local network automatically, or online with a Join Code.
From the session list, by IP address, or with the Join Code.
The app does the math; the GM can override afterwards.
When a player's character needs a roll, the app shows the exact dice and modifier, waits for the player's ROLL, animates the dice and resolves the result at once. GM-controlled creatures may roll automatically.
For one physical table: each roll can be made in the app or with physical dice, and the GM enters what the die shows. The app adds the modifiers and works out the outcome. Miniature markers with health rings suit a projected map.
Public listings of campaigns looking for players, and groups you can join. This is separate from Join Game: a live session still uses an eight-character Join Code and does not need an account.
Joining a listing happens in the Game Master app with an optional account (Find Campaigns, Find Groups, My Groups, Join Campaign). Steam and Google Play copies do not include accounts yet. Maps, notes and saves stay on the GM’s device; this site never shows invite codes.
Here’s our planned update order. There are no dates attached—we’ll release each stage when it’s ready.
Choose a rules preset, add house rules, or create your own tabletop system. The free character maker will support ruleset-specific sheets, and campaigns will check character compatibility. Existing AD&D characters and campaigns will remain supported.
We’ll expand the rules framework in this order:
These stages target the kinds of mechanics found in games such as RuneQuest, Call of Cthulhu, Vampire, Savage Worlds, and Fate.
Ruler-style movement, facing, and formation tools for miniature games.
Hex-board creation, movement paths, range measurement, terrain costs, elevation, and six-direction facing.
Expand into detailed walker combat, vehicles, squads, and army-scale play. Compatibility targets include the styles of BattleTech, Warhammer 40,000, Star Wars tabletop RPGs and miniature games, and other major systems.
Bring your own game—or invent one—and play online with a human GM controlling the world, enemies, and NPCs. Game Master handles the shared tabletop, calculations, and bookkeeping.
Collectible card games are outside this roadmap.
Game names identify compatibility goals, not announced official partnerships. Named presets and bundled content will depend on applicable permissions and licensing.
Game Master is available now on Google Play for Android. Game Master is coming to Steam on October 30th.
Coming to Steam on October 30th. Free Player Edition; the Full Toolkit (campaign building, Map Maker and hosting) and the Prison Escape adventure as Steam DLC.
Available now. Join sessions as a player for free, or unlock the Full Toolkit in the app to run the game from a tablet.