Build a mystery that asks the player to understand a situation. The starting envelope supplies a character, a city and a problem; the player then follows details in conversations, receipts, letters and a newspaper to choose what to do next. This is VITON13's own prototype.

The current quest catalogue contains four implemented stories and a roster of 26 Russian cities. The team setup accepts one to eight participants sharing a screen. The playable interface combines a procedural 3D city, dialogue choices, an evidence collection, travel and eight smartphone apps.

The city is rendered with three.js; the interface, story definitions and save system use JavaScript modules. We connect the current objective, the evidence collection and the phone to the same story state. Typographic newspapers and receipts make a document part of the investigation rather than an unreadable decoration.

On 2 October 2026 we opened the local game, started the free story and captured the opening envelope, character brief, city, conversation choices, evidence collection, newspaper and smartphone. The gallery shows real game screens. Existing story illustrations are AI-generated artwork from the game's own asset folder.