Say Anything

A dating sim where you can say anything — powered by real-time AI video generation.

Honarable mention at Odyssey-2 Pro Hackathon

Live Demo: https://say-anything-dxwn.vercel.app/

What Makes It Unique

Unlike traditional dating sims with fixed dialogue options, Say Anything lets you type whatever you want. Your custom responses are evaluated by AI and rendered as real-time video reactions using Odyssey's world model.

Want to give your date flowers? Just type "I got you some flowers" and watch them react in real-time video.

Features

• 5 Preset Characters - Mina, Kai, Luna, Alex, and River (each with unique personalities and appearances)
• Custom Character Creation - Create your own date character
• Real-time AI Video - Powered by Odyssey's world model for live video generation
• Say Anything - Type custom responses that get evaluated by OpenAI and rendered visually
• Action Support - Actions like giving flowers, ordering drinks, etc. are rendered in the video
• Relationship Meters - Trust, Chemistry, and Affection tracked throughout the date
• Multiple Locations - Cozy cafe or rooftop overlook
• 4 Mood Tones - Cozy, Comedy, Romantic, or Dramatic
• Hide UI Toggle - Press H to hide the UI and watch reactions unobstructed

Tech Stack

• Next.js 16 - React framework
• Odyssey SDK - Real-time AI video generation
• OpenAI API - Custom response evaluation (gpt-4o-mini)
• Tailwind CSS - Styling
• TypeScript - Type safety

Getting Started

Prerequisites

• Node.js 18+
• Odyssey API key (get one here)
• OpenAI API key (get one here)

Installation

1. Clone the repository:

   git clone https://github.com/wuyuwenj/Say_Anything.git
   cd Say_Anything

2. Install dependencies:

   npm install

3. Create a .env file based on .env.example:

   cp .env.example .env

4. Add your API keys to .env:

   NEXT_PUBLIC_ODYSSEY_API_KEY=ody_your_api_key_here
   OPENAI_API_KEY=sk-your_api_key_here
   

5. Run the development server:

   npm run dev

6. Open http://localhost:3000 in your browser.

How to Play

1. Setup - Choose your character, select a date partner, pick a location and mood
2. Date - Watch the AI-generated video of your date and respond to their dialogue
3. Choose or Type - Select from preset options OR click "Say something else..." to type anything
4. Watch Reactions - Your date reacts in real-time video based on what you say
5. Build Connection - Your responses affect Trust, Chemistry, and Affection meters
6. See Results - At the end, see how your date went based on your choices

Keyboard Shortcuts

• 1 2 3 - Select dialogue options
• H - Hide/show the conversation UI

Project Structure

src/
├── app/
│   ├── api/evaluate/    # OpenAI evaluation endpoint
│   ├── play/            # Main game page
│   ├── setup/           # Character & scene setup
│   └── results/         # End-of-date results
├── components/
│   ├── game/            # VideoPanel (Odyssey integration)
│   └── ui/              # Reusable UI components
├── content/
│   ├── characters.ts    # Character definitions
│   ├── episode1.ts      # Dialogue and choices
│   └── setupOptions.ts  # Locations and tones
└── lib/
    ├── promptBuilder.ts # Odyssey prompt generation
    ├── types.ts         # TypeScript types
    └── useGameEngine.ts # Game state management

License

MIT