The X-Men Expansion is the first full-sized sourcebook supplement for Marvel Multiverse RPG (written by Matt Forbeck). It was …
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Tabletop roleplaying games thrive on imagination, but even the most inventive Game Masters and players benefit from tools that deepen the world, enrich gameplay, and inspire unforgettable moments. That’s where supplements come in. Whether you’re adding magical treasures, mysterious cults, expansive cityscapes, or new character options, RPG supplements are the lifeblood of variety and longevity in any campaign.
This section of RPG Tabletop Games is your curated gateway to the best—and most impactful—supplementary materials in the hobby. From lore-packed sourcebooks to genre-defining adventures, GM-focused guides, and setting-expanding modules, we cover the products that take your tabletop experience beyond the core rulebooks.
Supplements are any official or third-party publications that expand upon an existing RPG system or setting. Unlike core rulebooks that establish the rules of play, supplements offer additional content that enhances the story, characters, worldbuilding, and mechanics. They can include:
Adventure modules (e.g., Curse of Strahd, The Enemy Within)
Character options (classes, races, feats, spells, gear)
Bestiaries and monster books
Game Master aids (prep guides, encounter builders, lore books)
Worldbuilding toolkits and region expansions
Theme-specific add-ons (horror, sci-fi, political intrigue, etc.)
The right supplement can unlock new avenues of play and storytelling—allowing GMs to challenge players in novel ways and providing players with richer, more varied character experiences.
Even the most beloved RPG systems can become creatively limiting over time. Supplements refresh the game by introducing:
New settings and cultures to explore
Plot-ready adventures and story hooks to reduce prep time
Unique magic systems or subsystems that add variety
Fully realized NPCs and locations to flesh out your world
Player options that diversify and enhance character creation
Tone shifts or genre blends, such as horror, mystery, or steampunk elements
They're also a fantastic way to bring fresh energy to long-running campaigns, especially when players are familiar with the core system.
This category contains in-depth, spoiler-free reviews of top RPG supplements across various genres and systems. We evaluate them based on:
Quality of writing and design
Ease of integration into existing campaigns
System compatibility and flexibility
Creative value and inspiration for GMs and players alike
Artwork, layout, and usability at the table
Whether you're planning a sandbox campaign, prepping your next dungeon crawl, or building a world from scratch, this collection will help you find the supplements that truly add value.
Explore the reviews, find your next favorite resource, and transform your tabletop stories from good to legendary.