Want to create a memorable fantasy campaign without building every detail from scratch? The Campaign Builder series from Kobold Press gives Game Masters practical tools, creative inspiration, and ready-to-use resources for building richer worlds for their 5th Edition tabletop roleplaying games.
Whether you’re designing an entire kingdom, populating a bustling city, creating a dangerous dungeon, or setting sail on a pirate adventure, these books help you turn your ideas into playable adventures.
What Is the Campaign Builder Series?
The Campaign Builder series is a collection of worldbuilding and game design toolkits for 5th Edition fantasy roleplaying games. Each book focuses on a different part of campaign creation, giving Game Masters the guidance and resources they need to build compelling settings, develop exciting encounters, and bring their homebrew campaigns to life.
Instead of providing a single setting or adventure you must follow, Campaign Builder books give you the tools to create your own. Use them to expand an existing campaign, develop an original fantasy world, or find inspiration when you’re not sure what happens next.
Inside the series, you’ll find resources such as:
- Worldbuilding guides to help you design believable kingdoms, settlements, dungeons, and more.
- Random tables and generators to spark ideas for NPCs, rumors, encounters, locations, and adventure hooks.
- Game-ready resources to help you spend less time preparing and more time playing.
- New character options and game content to give players more ways to interact with your world.
- Plug-and-play maps for specific, unique locations you can use at any gaming table.
- GM tracking tools to help you organize your creations and bring encounters to the table.
How Can Campaign Builder Help Your Homebrew Game?
You don’t need to be an experienced worldbuilder to create an exciting campaign. The Campaign Builder series helps Game Masters of all experience levels turn ideas into playable content.
Starting a new campaign: Use the books to build your setting from the ground up, from a kingdom’s political structure to the secrets hidden beneath its streets.
Need to prepare your next session: Turn to the tables, NPCs, locations, and encounter-building resources for quick inspiration when you need it most.
Expanding a world your players already love: Add new factions, settlements, dungeons, and adventure opportunities without reinventing everything from scratch.
Looking for inspiration: Browse the books for a single encounter, a new location, or an unexpected plot twist. Use as much or as little of each toolkit as your campaign needs.
The books support your creativity; they don’t replace it. Adapt the material to your setting, combine ideas from multiple volumes, and make every element your own.
Explore the Campaign Builder Series
Each Campaign Builder book focuses on a different part of fantasy worldbuilding. Together, they give you a growing collection of resources for creating adventures across a variety of games and play styles.
Campaign Builder: Castles & Crowns
Rule your realm.
Build kingdoms filled with ambitious rulers, political intrigue, and powerful factions. Campaign Builder: Castles & Crowns gives you tools to develop royal courts, noble families, castles, and manors, along with NPCs, adventure hooks, and new game options.
Use it to create a kingdom from scratch or add depth and intrigue to an existing game.
Best for: Kingdom building, political intrigue, and royal adventures.
Campaign Builder: Cities & Towns
Make every settlement an adventure.
Bring your world to life with memorable settlements, colorful NPCs, competing factions, and secrets around every corner. Campaign Builder: Cities & Towns offers tools for designing everything from remote villages to sprawling metropolises, with random tables, rumors, and plot hooks to inspire your next session.
Use it to create bustling hubs your players will want to explore.
Best for: Settlement design, urban adventures, and memorable NPCs.
Campaign Builder: Dungeons & Ruins
Brave the darkness.
Design dangerous dungeons, forgotten ruins, and underground adventures with tools for layouts, traps, hazards, monsters, and exploration challenges. Campaign Builder: Dungeons & Ruins also offers new character options, spells, and magic items to enhance your next expedition.
Use it to build anything from a small monster lair to a sprawling megadungeon.
Best for: Dungeon design, exploration, traps, and ancient ruins.
Campaign Builder: Pirates & Plunder
Hoist the sails!
Take your campaign to the high seas with tools for pirate crews, ship-to-ship combat, black powder rules, and nautical adventures. Campaign Builder: Pirates & Plunder adds new character options, seafaring threats, and treasure-filled adventure opportunities.
Use it to launch a pirate campaign, add naval encounters to an existing game, or send your heroes chasing legends across the waves. Campaign Builder: Pirates & Plunder releases in late October 2026.
Best for: Pirate campaigns, naval combat, and seafaring and treasure hunting adventures.
Get More for Your Campaign with Campaign Builder Bundles
Ready to put your worldbuilding tools to work? The new Campaign Builder bundles make it easier to bring these toolkits to your game table.
Each bundle includes three essentials:
- The hardcover book — Your complete worldbuilding toolkit, ready to reference during campaign prep.
- The PDF edition — Searchable digital access to your resources wherever you prepare or play.
- The Map Folio — Beautiful, ready-to-use maps to bring locations and encounters to life at the table.
Get all three together for $74.99 and save 20% compared with purchasing the components separately.
Whether you’re mapping a sprawling city, planning a dangerous dungeon expedition, developing a royal stronghold, or preparing a voyage across treacherous waters, the Campaign Builder bundles give you more resources to bring your ideas to life.
Build your world. Prepare your next adventure. Let your players make it legendary.
Explore the Campaign Builder series from Kobold Press and find the tools to build your next great campaign.
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