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SET: 3D Edition is a mobile Android game built in Unity that transforms the beloved analog pattern-recognition card game SET into a premium, tactile digital board game. Players race in real time to spot valid Sets — groups of three cards where each of the four attributes is either all the same or all different across the trio — before their opponents can claim them first. The project is currently in pre-production: the architecture, rules, and design are fully specified, but most features have not yet been implemented in code.
Pre-production project. SET: 3D Edition does not yet have a playable build. All features described in this documentation are planned unless a page explicitly states otherwise. Designs, API surfaces, and technical decisions may change as development progresses.

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Why this documentation exists

This documentation exists to give every engineer on the project — junior or intermediate Unity/C# developer — a single, authoritative source of truth covering game rules, architecture decisions, coding conventions, and task breakdowns. Rather than scattering context across GDD PDFs, Slack threads, and whiteboard photos, these pages consolidate what you need to understand the project and start contributing without guessing.

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Who this is for

These docs are written for junior-to-intermediate Unity/C# developers who are already comfortable writing MonoBehaviours and C# classes but may not yet have experience with reactive programming (R3), server-authoritative multiplayer (Nakama), or Clean Architecture patterns. Wherever a concept is more advanced, the relevant page links you to deeper reading.

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Project summary

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Game modes (all Planned)

Single Player vs AI

Compete against a rule-based AI opponent across Practice, Campaign, and Daily Challenge sub-modes with four difficulty tiers.

Online Multiplayer

2–4 players in server-authoritative real-time matches via Nakama — Quick Match, Ranked, Private Rooms, and Tournaments.

Pass & Play

2–8 players on a single device, fully offline. Color-coded claim zones let everyone race simultaneously at the table.

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Technology stack

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Core design pillars

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Explore the project

Understand the Rules

The complete, implementation-ready rules for the SET card game — deck, validation algorithm, board logic, and every edge case.

Learn the Architecture

How Clean Architecture, R3, Nakama, and VContainer fit together across the four layers of the codebase.

Follow the Roadmap

Phased delivery plan from vertical slice through full social layer and monetisation.

Start Contributing

Environment setup, coding standards, branching conventions, and your first task.
Common mistake: Treating this as a “puzzle app” rather than a digital board game. The positioning as a digital board game (round structure, social scaffolding, 3D table presence) drives a large number of architecture and UX decisions throughout the project. Keep that framing in mind as you read.