For Game Masters · Ready-to-run

Adventures

All released Mar de Oro adventures are free, system-neutral, and runnable online. Play them independently or follow them in order as the opening of Shadows of the Compañeros. San Telmo also includes a downloadable PDF Quickstart. Adventure pages are written for the GM and contain spoilers.

Play in order and carry the recorded state forward: The San Telmo Incident → Ash on the Ledger → Masks at the Table → The Shadowed Tide.

Played at the original table

These adventures grew out of the original Mar de Oro campaign. Each was played at the table first, then revised for publication to improve clarity, player agency, GM usability, continuity, and standalone support.

  1. Adventure Zero · Shadows of the Compañeros

    The San Telmo Incident

    A signal fails at an inland estate, an engineer disappears, and several authorities converge on a cordon where the official account does not match the evidence.

    4–6 players · 3–5 hours · Full web adventure plus downloadable PDF, with six pregens, player materials, handouts, and GM tools

    Open the adventure

  2. Adventure One · Shadows of the Compañeros

    Ash on the Ledger

    Boca Serena has been repainted for a summit. A ledger has been recopied, a name has vanished, and everyone wants to know what survived San Telmo.

    4–6 players · 4–6 hours · Website-only adventure with player packet, full printable player kit, handouts and maps, GM Quick Reference, carry-forward Adventure Record, and local table tracker

    Open the adventure

  3. Adventure Two · Shadows of the Compañeros

    Masks at the Table

    The summit is underway. Every speech is public, every useful decision is being made elsewhere, and the DeSauros mission must build leverage without losing the people it has promised to protect.

    4–6 players · One long session or two shorter sessions · Website-only adventure with player packet, printable player kit, three handouts, Summit District map, GM Quick Reference, carry-forward Adventure Record, and local table tracker

    Open the adventure

  4. Adventure Three · Shadows of the Compañeros

    The Shadowed Tide

    Protected trade routes are moving people through Porto Sombra. The crew must choose what to rescue, what to prove, whom to trust, and what can survive exposure.

    4–6 players · One long session or two shorter sessions · Website-only adventure with player packet, printable player kit, the Shadowed Tide Message handout, Boca Serena map, GM Quick Reference, carry-forward Adventure Record, and local table tracker

    Open the adventure

Adventure support

Adventure Tables

Roll adventure-specific NPC details and regional encounters when the players leave the prepared route.

Open the adventure tables

GM procedure

When the Players Walk Away

What to do when the table ignores a clue, abandons an investigation, rejects the adventure premise, or chooses something else.

Read the GM procedure

The larger campaign

These adventures adapt the opening of Shadows of the Compañeros into ready-to-run sessions. The full campaign reference covers all eight acts, factions, clocks, and handouts, and contains spoilers for everything.

Open the campaign reference