Waterdeep: Dragon Heist: It's not just this module on its own, which is a stellar example of a typical D&D setting and adventure.Examples Of Inspirational Campaigns and Modules

There are literally hundreds to choose from, but some are iconic, inspiring more homebrews than others. The current library of modules and existing campaigns based on D&D rules offers something for everyone. Modules often include campaign ideas that homebrewers can use. Many of these resources are specific to certain genres when building a game that includes characters like vampires or pirates, while others are more general in nature. A single adventuring campaign can go through a number of modules, so this is something that homebrewers should keep in mind if they want to build their own. The module is the setting in which the campaign takes place. There are also plenty of adventuring modules a D&D adventuring party could enjoy.

What sets it apart is the unique character builder that allows players to create characters that can be virtually anything.

13th Age Core Book: Another TTRPG that resembles D&D, 13th Age was developed at about the same time.

It details the ten distinct guilds of Ravnica, which includes information about local races and customs and includes suggestions for homebrew campaigns that use the setting.

Guild Master’s Guide to Ravnica: This resource crosses over into the Magic: The Gathering card game.

Note that the 1st Edition is closer to D&D than the recent 2e release.

Pathfinder Core Rulebook: The Pathfinder universe has a lot in common with D&D when it comes to the setting, mechanics, and aesthetic, but takes character customization to a whole other level.

Tales From The Yawning Portal: Named after a famous tavern in D&D lore, a homebrew campaign can certainly start here and go just about anywhere.

Xanathar's Guide to Everything: A supplemental book that expands on the existing player and DM handbooks, it includes information about curious objects, mysterious monsters, and new character classes.

The World Builder's Journal of Legendary Adventures: Anyone can have fun with this book, which consists of 365 writing prompts to create a unique storyline for any campaign.

Endless dungeon modules stop working