Mutants & Masterminds

A classless, point-buy superhero TTRPG that excels at custom hero concepts, campaign-scale comic-book play, and tables willing to trade simplicity for power-building freedom.

At-a-glance

Superhero toolkit • Classless point-buy powers • d20-derived action checks and Toughness saves • Gamemaster-led • 3-6 players • Best for long campaigns and custom hero builds

Genres:
Superheroes
Systems:
d20 System
Mechanics:
Campaign Character Customization Tactical Team-Based
Visit game site View reviews or buy
Mutants & Masterminds

Mutants & Masterminds is still one of the strongest superhero TTRPGs for groups that want to build their own heroes instead of choosing from narrow classes or a fixed licensed cast. It shines when the table wants custom powers, comic-book campaign scale, and enough system weight to make different builds feel genuinely different in play.

It is a weaker fit if your group wants low-prep one-shots, effortless character generation, or a supers game where the rules mostly disappear behind scene framing. Mutants & Masterminds rewards tables that enjoy tuning concepts, judging tradeoffs, and letting a Gamemaster turn those builds loose against recurring villains, crises, and escalating comic-book problems.

What the game is

Mutants & Masterminds is Green Ronin Publishing's long-running superhero TTRPG, designed by Steve Kenson and built from d20 roots into a classless, point-buy superhero engine. The official line presents it as a game for creating your own comic-book stories rather than inheriting one default setting or one narrow superhero subgenre. Street vigilantes, teen teams, cosmic defenders, occult mystery heroes, and Justice League-scale ensembles can all fit in the same chassis if the Gamemaster sets the campaign's assumptions clearly.

The game's identity comes from flexibility plus constraint. You can model an enormous range of concepts, but the table still needs agreed campaign limits, power benchmarks, and tone. That is why the system is so appealing to some groups and so exhausting to others: it gives you a real superhero toolkit, not a pre-solved supers genre experience.

Publication history and editions

Mutants & Masterminds first appeared in 2002 and became one of Green Ronin's flagship lines. The official Deluxe Hero's Handbook describes itself as the revised and expanded core rulebook for Third Edition, and notes that the Third Edition rules first debuted in the now out-of-print DC Adventures books before being consolidated into the main line.

For practical buying decisions in 2026, the supported shelf still centers on the Third Edition family: the free Quick-Start, the Basic Hero's Handbook, the Deluxe Hero's Handbook, and the wider support line. At the same time, Green Ronin is now selling the Fourth Edition Playtest Origin Edition, so the game's future direction is visible, but not yet the settled default starting point for most tables.

What you need to play

The cleanest first step is the free Quick-Start, which teaches the single-d20 action check loop, damage resistance, and hero points through a short sample scenario. After that, Green Ronin's own onboarding page recommends the Basic Hero's Handbook first and the Deluxe Hero's Handbook after that.

That advice is sensible. The Basic book is written for newer players, streamlines and clarifies the Third Edition rules, and stays fully compatible with the Deluxe book and the wider Third Edition library. The Deluxe book is the better long-term core once the table knows it wants the full toolkit, because it adds more complete guidance, archetypes, settings context, and support for building your own campaign from scratch.

Major supplements, settings, and support

The official Mutants & Masterminds HQ collection makes the line's shape easy to read. Beyond the core books, the major support families include the Deluxe Gamemaster's Guide, Power Profiles, Threat Report, Rogues Gallery, Emerald City, and a long adventure line that now includes Astonishing Adventures Assembled! and newer individual PDF scenarios.

That matters because Mutants & Masterminds is at its best when the table has examples to steal from. Power Profiles and similar books reduce the burden of inventing every effect from zero. Setting books such as Freedom City or Emerald City help a campaign feel like comics rather than a sequence of disconnected power tests. Villain books and adventures are especially useful because Gamemaster prep is one of the system's real friction points.

Third-party ecosystem and digital support

The line has more ecosystem depth than a single core rulebook suggests. Green Ronin's about page and HQ page both point to the Super-Powered by M&M trademark license, which has long allowed compatible third-party support. The official Third Edition support-files index also still hosts character sheets, previews, free adventures, and utility downloads.

Digital support exists, but the game's real ecosystem is still books, PDFs, and support files rather than one dominant first-party VTT. There is an official Roll20 compendium edition of the Basic Hero's Handbook, which helps online groups, but the harder part of online play is still superhero build management and scenario prep rather than just character sheets.

Core rules and play structure

At its core, Mutants & Masterminds resolves actions with a d20 roll plus modifiers against a difficulty number. The Quick-Start lays out the essentials clearly: the game runs on action checks, resistance checks, damage resistance instead of hit points, and hero points that let characters push crucial moments back in their favor.

What makes the system feel different from many d20 descendants is what surrounds that core roll. Characters are built from points, not classes. Damage usually produces condition pressure rather than a simple hit-point countdown. Campaigns are commonly framed around a chosen power level that sets expectations for how extreme characters and threats should be. In practice, that means the game spends more of its complexity budget on hero design, power interactions, and encounter consequences than on procedural dungeon-crawl logistics.

Characters, roles, and advancement

Mutants & Masterminds is one of the clearest classless superhero systems on the market. You are not picking "blaster" or "brick" from a fixed list and living inside it forever. You build a concept through powers, skills, advantages, defenses, complications, and gear, then tune it until it behaves like the comic-book protagonist you actually imagined.

That freedom is the game's biggest selling point and its biggest barrier. It is excellent for players who want to model unusual power suites, hybrid archetypes, or very specific comic inspirations. It is rougher for players who would rather choose from a handful of finished templates and start scene one. Advancement continues the same pattern: power points let heroes evolve in ways that stay tied to concept rather than to a preset class tree, which is one reason the game works so well in campaigns.

Signature mechanics

The signature mechanics are not a single gimmick so much as a recognizable cluster. Point-buy power construction lets the table build almost any superhero effect it can describe. Hero points give players a visible way to push past bad luck or seize a big moment. Toughness and condition-based damage keep comic-book resilience in play better than ordinary hit-point attrition would. Together, those pieces create a game where customization, spotlight moments, and big swings matter more than incremental chip damage.

The tradeoff is that every one of those strengths adds adjudication load. A table that loves edge-case power builds will eventually need to answer how those builds interact with campaign assumptions, villain design, and spotlight fairness. Mutants & Masterminds can handle that work, but it does not hide the work.

What play feels like

At the table, Mutants & Masterminds usually feels like a capable comic-book ensemble game with a lot of room between fights. Teams investigate threats, argue strategy, protect civilians, chase villains, improvise around collateral damage, and then hit set-piece confrontations where powers finally collide. It can absolutely run street-level sessions, but the system's real pleasure is seeing distinct hero concepts solve the same crisis in different ways.

When it works, it feels broad and generous. A speedster, a martial artist, an inventor, a psychic, and a flying powerhouse can all matter without sharing the same action language. When it goes badly, it feels front-loaded and argumentative: build questions sprawl, combats slow down, and the table spends too much time checking whether a cool idea is also a fair one.

Running the game

The Gamemaster burden is real. Building villains, setting power boundaries, vetting character builds, and judging comic-book edge cases all take more effort here than in lighter supers games. That does not make the game unusable, but it does mean a strong first campaign is usually one with a narrow premise, clear campaign power level, and a short approved source list for character options.

The official support line helps a lot. Ready-made archetypes, prebuilt threats, setting books, and adventure material reduce the need to custom-engineer everything. New Gamemasters should take that help. The worst way to start Mutants & Masterminds is to promise "anything goes" before the group has agreed on tone, scale, and what kinds of powers the campaign is actually prepared to support.

Campaign fit

This is primarily a campaign game. The free Quick-Start and ready-made heroes can support a one-shot, but the system really pays off when the same team returns, relationships and complications accumulate, villains come back with grudges, and players spend power points in ways that change their heroes over time.

That campaign strength is also why the game remains strategically useful on this site. Plenty of superhero TTRPGs can deliver one dramatic issue. Fewer can handle a long run of original heroes across street, world, and cosmic scales without forcing the table into one fixed comic-book tone.

Reception and awards

Mutants & Masterminds has one of the stronger award histories in the superhero TTRPG space. It won the 2003 Gold ENNIE for Best d20 Game. Second Edition won Gold ENNIEs for Best Game and Best d20/d20 OGL Product in 2006, plus a Silver ENNIE for Best Product. The Hero's Handbook for Third Edition took Silver for Best Game in 2011.

Critical and player response has been consistent for years. Praise usually centers on breadth, concept freedom, and how well the system supports many flavors of superhero campaign once the table has bought in. The recurring caveats are also stable: character creation can be slow, power design can be intimidating, and Gamemasters do more balancing and scenario construction than they would in lighter supers games. The pattern is visible both in long-running store feedback on the Deluxe Hero's Handbook and in the older but still representative RPGnet review of the Deluxe Hero's Handbook.

Where it is strongest

  • Original superhero campaigns with highly customized heroes and recurring villains.
  • Groups that want one rules engine to handle street, team, cosmic, and weird-comic power scales.
  • Players who enjoy designing powers and watching their builds express character concept, not just combat role.
  • Gamemasters willing to use the support line to build a durable comic-book campaign instead of a one-night demo.

Where it can frustrate groups

  • Character creation can overwhelm players who want instant onboarding or very light prep.
  • Gamemasters carry real load when policing option sprawl, encounter fairness, and unusual power interactions.
  • The system is less graceful for casual one-shots than superhero games built around pregens, scenes, or narrower premises.
  • Tables that want loose narrative supers rather than build depth may feel like they are paying for flexibility they do not need.

Content and safety notes

The baseline content profile is comic-book action: superpowered violence, property destruction, imprisonment, collateral damage, and villains using coercion, mind control, mutation, or body-altering powers. The exact intensity depends on the campaign frame. Four-color optimism, teen-hero drama, grim vigilantes, and apocalyptic cosmic threats all sit comfortably inside the rules, so the table should set tone early rather than assuming the genre label is specific enough on its own.

Best starting path

Start with the free Quick-Start. If the table likes the core rhythm, move to the Basic Hero's Handbook for the easiest real onboarding path. Once the group knows it wants the full toolkit, step up to the Deluxe Hero's Handbook, then add the Deluxe Gamemaster's Guide, Power Profiles, setting books, and adventure support based on the kind of campaign you actually want to run.

If you are already sure your table wants a long campaign with custom heroes, you can start at Deluxe immediately. If you are not sure, do not force the full build engine too early. Mutants & Masterminds earns its reputation when the group grows into it, not when it is treated like the easiest first superhero one-shot on the shelf.

Research notes

Last checked: July 4, 2026.