Investigate
Search original locations, recover evidence and work together during an increasingly dangerous ghost hunt.
Haunted Echoes Studios · An Original Fictional World
The 9th Vessel
A 1–4 player cooperative paranormal investigation and survival-horror mystery set in Calder, Arizona, a wholly fictional copper-mining town.
On Halloween weekend, Calder's Main Street festival attracts visitors expecting an ordinary ghost hunt. As the team explores, shifting clues and increasingly unnatural encounters suggest the town has a history nobody wants to confront.
Explore CalderDevelopment Status
1–4 InvestigatorsFictional Arizona TownUnityAdaptive Mystery
Story Foundation
The mystery has a fixed truth.
Evidence placement, paranormal events and AI-directed pressure can differ between investigations. The hidden history stays consistent, but what the team discovers and the choices it makes can change its experience.
Interpret
Connect records, witness accounts, environmental clues and encounters to uncover the town's hidden story.
Choose
The team's discoveries and decisions affect its path through the mystery.
Twelve Main Investigation Spaces
Explore fictional Calder.
These are original settings for the game, not recreations of named real-world businesses, landmarks or interiors. Research into Arizona mining history informs their atmosphere and period details.
Main Street / Festival District
Festival crowds, nightlife and a continuous walkable commercial district.
Town Square
Calder's central gathering space and the start of an ordinary ghost hunt.
Calder Grand Hotel
A fictional mining-era hotel with a substantial interior investigation space.
Founder's Mansion / Museum
An old company residence converted into a museum and town archive.
High School / Art Center
A former school adapted into creative studios and exhibition spaces.
Mission Church
Calder's oldest public landmark, rebuilt and restored over many generations.
Mercantile / General Store
An old supply store with a long commercial history.
Saloon
A fictional gathering place for music, rumors and late-night visitors.
Historic Theatre
A silent-film-era theatre created specifically for Calder.
Main Street Restaurant & Bar
A large, popular festival destination with a spacious dining room and bar.
Former Hospital / Clinic
An old medical building and an extensive indoor investigation space.
Old Calder Mine Camp
A surface company district with mining-era offices and industrial structures.
Ten Secondary Investigation Spaces
A town beyond the main streets.
Shorter explorations and connected neighborhood spaces make Calder feel like a place with its own everyday life.
S1Cemetery
S2Town Hall / Marshal's Office / Jail
S3Boarding House
S4Commercial Block / Shops
S5Old Elementary School
S6Workers' Houses
S7Water Tower / Utility Area
S8Plateau Rim Overlook
S9Service Alleys / Back Lots
S10Outer Ranch Road / Trailheads
World Building
Historically inspired. Entirely fictional.
Real Arizona mining towns are research references only. Calder has its own history, streets, commercial buildings and explorable interiors, designed without requiring a one-for-one recreation of real properties.
Festival Streets
Main Street, shops and lively public spaces introduce the investigation.
Mining Heritage
Original industrial and company-era environments bring Calder's copper past to life.
Atmospheric Exploration
Invented room layouts, sightlines and connected areas support cooperative gameplay.
Production Status
Building Calder in Unity.
The fictional setting and story framework are established. Next, the team is translating them into an original playable town, beginning with the terrain and a fictional hotel.
Story Foundation
The main investigation framework is defined. Major revelations and hidden systems remain off the public website.
First Prototype
Calder's terrain, an original hotel lobby and adjoining rooms form the first practical Unity milestone.
Original Visuals
New fictional concept artwork, environments and gameplay footage will replace retired real-location previews after review.