Version 1.0 · free release

Download Sudos.

Install the complete Sudos player and visual World Builder in a much smaller core package. It includes the AI-free, media-free text edition of The Orb Cycle: the same 280 authored locations, puzzles, combat, choices and four endings as the illustrated edition.

No expiry. No subscription required.Version 1.0 is free to download, play and use for building adventures.
SUDOS is independently developed.Support SUDOS on Patreon
Sudos showing an illustrated adventure beside its prose and recent actions

Player and World Builder

Choose your platform.

Windows uses the guided Sudos installer, Linux comes as a portable ZIP, and macOS comes as a signed, notarized disk image. No separate runtime is required. Downloads are approximately 48–59 MB.

The Windows installer is not yet digitally signed, so Microsoft Defender SmartScreen may display an “unrecognized app” warning. After confirming it was downloaded from this page, choose More info → Run anyway. On Mac, open the DMG and drag Sudos into Applications. Both Mac downloads are Developer ID signed and notarized. Read the release notes.

More worlds to explore and edit

Adventure library.

Each download is an editable .sudosadventure package. Open it in the World Builder to inspect how it works, change it or use it as the starting point for something new. Artwork and audio are kept separate from the core application.

IllustratedText only
A ruined throne room from the illustrated edition of The Orb Cycle

The Orb Cycle — Illustrated Edition

Illustrated

The complete flagship adventure with 280 location images, 57 character portraits, 198 creature portraits, ambience and music. Gameplay and story are identical to the included text edition.

246 MB · 549 managed assetsDownload illustrated edition ↓

The Orb Cycle — Text Edition

Text only · AI-free

The complete 280-location adventure without images, portraits, music or sound. This is already included with Sudos; the separate package is provided for authors who want an editable copy.

0.4 MB · complete 700-step route verifiedDownload editable text edition ↓

Sherlock Holmes: The Adventure of the Blackwood Cipher

Text only

Investigate a cryptographer's disappearance through London streets, archives and a criminal printworks. Follow the evidence, question witnesses and solve an original Holmes case.

Download adventure ↓
The Admiral Benbow inn on a stormy evening

Classic Treasure Island

Illustrated

A richly interactive adaptation of Robert Louis Stevenson's novel, from the rain-dark Admiral Benbow to the stockade, mutiny and Flint's buried hoard.

Download adventure ↓
A strange clockmaker's room filled with mechanisms

The Thirteenth Chime

Illustrated

A compact clockwork escape adventure with twelve linked puzzles, changing visitors and a door determined to remain shut.

Download adventure ↓

The Picture of Dorian Gray

Text only

A substantial Gothic adventure about beauty, influence, secrecy and the portrait that keeps the account. Adapted into an explorable, choice-driven world.

Download adventure ↓
A modern coastal inn during a rainstorm

Treasure Island: Modern

Illustrated

A present-day coastal thriller in which sixteen-year-old Jim Hawkins discovers a hidden salvage fortune and sails into a dangerous mutiny.

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The Last Light of Orpheus

Text only

A science-fiction survival mystery aboard a research vessel falling into a star. Restore failing systems while deciding which discoveries deserve to survive.

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A lantern-lit courtyard used by the Sudos tutorial adventure

The Lantern Trial

Illustrated

The companion project for the free World Builder course. Examine a practical adventure while following the lessons that construct its rooms, systems and quests.

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Neon Debt

Text only

A cyberpunk infiltration through rain, memory markets and a corporation that owns tomorrow's testimony. Built to demonstrate a very different tone and setting.

Download adventure ↓

The Iron Grid

Text only

A focused 10-by-10 proving ground for weapons, armour, carrying capacity, respawns and weighted loot. Useful for players who want to inspect combat systems.

Download adventure ↓

Adding an adventure

Import it in a few clicks.

Download the adventure file, open Sudos and choose Adventures. Select Import Adventure…, then choose the downloaded .sudosadventure file. Sudos copies the complete editable adventure and any managed artwork or audio into your library; the original download can then be archived or removed.

These packages require the Sudos application above. They are projects for the full player and World Builder rather than separate applications.

Something not working?Tell us about a download problem, an adventure issue or anything that could be better.
Feedback & bug reports