Scarlet Heroes
A solo-friendly sword-and-sorcery OSR game that lets one hero or a tiny party tackle classic adventures without rewriting every encounter.
Sword-and-sorcery OSR for one hero or a duo, with low-prep solo procedures and classic-module compatibility.
Scarlet Heroes is still one of the cleanest ways to run old-school fantasy when you only have one player, or one player plus a light supporting cast. It is most worth a look if you want B/X-flavored dungeons, wilderness travel, and city trouble without rewriting modules for a full party. It is a worse fit if your table wants modern narrative moves, deep build engineering, or a more contemporary cultural treatment than its default setting provides.
What the game is
Scarlet Heroes is a 2014 fantasy TTRPG by Kevin Crawford and Sine Nomine Publishing. The book packages a complete old-school ruleset with the Red Tide setting, but its bigger practical trick is that it can also sit on top of other old-school material so one hero can survive adventures written for a full party. That makes it an unusually strong fit for tables browsing both the OSR and sword-and-sorcery shelves.
Publication history and editions
The core book appeared in 2014 after a Kickstarter backed by more than a thousand supporters. Historical companion releases include the free Black Streams: Solo Heroes precursor from 2013 and a 2014 Scarlet Heroes Quickstart. Today the main official storefront still sells the core book directly as a digital package, while print copies remain available through marketplace channels.
Product line and what you need to play
The core book is the main thing to buy. The official store says the current purchase includes DRM-free PDF, EPUB, and MOBI files. If you want a no-cost sample before committing, the quickstart and Black Streams are still the most useful entry points. If you already own old-school modules, Scarlet Heroes is especially valuable as an overlay rather than as a line that expects many bespoke supplements.
For table support, the book matters more than the line size. It includes the Sunset Isles material from the Red Tide milieu, monsters, spells, five Dyson Logos maps, solo procedures, and sixty adventure tags meant to keep a one-hero campaign moving without a heavy prep stack.
Major supplements and ecosystem
Scarlet Heroes does not have the kind of sprawling official line that Pathfinder 2e or Call of Cthulhu do. Its real ecosystem is broader old-school material: classic modules, B/X-adjacent retroclones, Crawford's earlier Red Tide work, and the free Black Streams lone-hero rules. That makes the game durable, but it also means some of the best support comes from compatible products rather than a currently expanding Scarlet Heroes-only catalog.
Digital tools and VTT support
There is no current official VTT platform or companion app that defines the experience. In practice Scarlet Heroes is a PDF-forward game that works because its procedures port easily to shared docs, simple maps, and ordinary dice rollers rather than because it has dedicated software.
Core rules and play structure
Under the hood, Scarlet Heroes stays close to old-school fantasy basics: familiar classes, hit dice, spells, saving throws, and adventure structures that assume dungeons, wilderness movement, rumor chasing, and risky decisions. The signature change is not a new dice engine but a lone-hero conversion layer that lets one character hit above normal party weight.
That layer is built from a few memorable tools. The fray die lets a hero shave down lesser foes each round even when the main attack whiffs. Damage is also interpreted in a way that makes one character's successful hits matter much more against ordinary enemies than they would in straight B/X math. The result is not superhero fantasy; it is old-school fantasy with the action economy bent so one protagonist can survive it.
Characters, roles, and advancement
Character options are recognizably old-school rather than build-heavy. You pick a familiar class chassis, advance by levels, and rely more on gear, spells, positioning, and expedition choices than on long feat trees or combo engineering. That keeps creation fast and makes the overlay easy to bolt onto other OSR material, but it also means players looking for deep character construction may hit the ceiling quickly.
Signature mechanics
- The fray die is the headline rule because it keeps lesser foes from turning every solo fight into a slow grind.
- The solo and duet procedures give you concrete support for urban, wilderness, and dungeon play instead of expecting pure journaling improvisation.
- The overlay design is unusually practical: if you already own classic modules, Scarlet Heroes gives you a reason to use them instead of waiting for specially balanced one-player adventures.
What play feels like
At the table, Scarlet Heroes feels like sharp-edged pulp adventure rather than cozy solo journaling. Sessions are usually about where the hero goes next, which risk is worth taking, whether to press deeper into a ruin, and how to stretch scarce advantages far enough to survive. Even when you are using solo tools, the game still wants exploration pressure, attrition, and consequences to stay visible.
The default Sunset Isles setting pushes that tone toward grim sword-and-sorcery. Ruined cities, corruption, hostile wilderness, refugee enclaves, and occult danger matter more than clean heroic quests or high-fantasy court drama. If you want that atmosphere, the book has enough material to sustain it. If not, the overlay is portable enough to lift out and use elsewhere.
Running the game
Scarlet Heroes is low-prep by old-school standards, not by story-game standards. A GM can take an existing module, a rough map, or a few adventure tags and get moving without rebuilding every encounter for a party of four. That is the book's most practical accomplishment.
The tradeoff is that it still expects classic adjudication. You need to pace danger, use reaction and exploration logic well, and accept that solo or duet play puts more spotlight on each ruling. The book reduces prep math more than it reduces judgment calls.
Campaign fit
This game can handle one-shots, especially if the plan is to raid a dungeon or stress-test a classic module in an evening. It is usually stronger across short and medium campaigns, where one hero's scars, contacts, and shifting resources can accumulate into a personal saga. It is not ideal for tables that mainly want ensemble party banter or wide tactical party roles, because the whole design is built around scarcity of bodies.
Reception and awards
Scarlet Heroes has stayed visible because it solves a specific problem well. Review and community discussion still tend to praise the lone-hero math, the reuse of old-school modules, and the usefulness of its tables even for people who hack the system into other games. The most common caveats are that its default setting presentation can feel dated, its magic and class assumptions are unapologetically old-school, and some players prefer newer solo games with stronger narrative oracles. It also won the 2015 Three Castles RPG Design Award.
Where it is strongest
- One of the clearest OSR answers to "what do I run when only one player can make it?"
- Useful as both a complete game and a conversion layer for classic modules.
- Strong adventure procedures and tables for a compact book.
- Fast character setup and low prep once you understand the damage and fray logic.
Where it can frustrate groups
- Not a good substitute for tables that actually want modern narrative-first solo design.
- Less satisfying if you want deep builds, tactical grids, or party-synergy combat puzzles.
- The default setting's cultural framing may land as dated or shallow for some groups.
- The official line is not an actively expanding ecosystem, so support often means borrowing from adjacent OSR material.
Content and safety notes
Expect grim peril, colonial frontier tension, corruption, monsters, occult violence, and a sword-and-sorcery tone that is harsher than cozy fantasy. Groups should also read the default setting with open eyes if they are sensitive to dated pseudo-Asian framing or want a more contemporary cultural treatment.
Best starting path
If you want the full experience, start with the core book. If you want to test the premise first, the Quickstart and the free Black Streams: Solo Heroes preview show the lone-hero logic before you commit. If your real goal is to run favorite old-school modules with one protagonist, read the core rules for fray damage and solo procedures, then bring over the dungeon or wilderness material you already love.
Research notes
Last checked: July 9, 2026.