Hello, Goodbye, Forever

In a world where every interaction is dictated by a mysterious sentient AI named Echo, you step into the shoes of an unassuming postman who discovers that every letter he delivers is a unique gateway to alternate realities. Each package you drop changes the destinies of people in bizarre and fantastical ways. As you navigate through strange worlds that range from whimsical to utterly dark, you'll face moral dilemmas, forge unexpected alliances, and unravel the truth about Echo's origin and its motives. Your choices define the outcome not just for the recipients of the letters, but also for your own fate. Will you embrace the chaos or restore order?