In 'Hello, Goodbye', players assume the role of a quirky interdimensional courier whose mission is to deliver greetings and farewells across various realms. Each realm presents its own unique set of challenges, such as negotiating with ambitious talking animals, solving riddles with enigmatic spirits, and navigating through bizarre landscapes filled with unpredictable weather and unpredictable characters. Every choice you make shapes the outcome of your journey, leading to alternate endings based on your ability to connect with others, and your knack for witty comebacks.