Step into the enigmatic world of 'Obsidian Shadows,' where you assume the role of an eccentric archivist discovering an ancient library hidden beneath the bustling streets of a modern city. As you delve into the cryptic volumes of the library, you uncover a conspiracy that dates back centuries, revealing that some books are portals to alternate realities. Use your wit and intuition to navigate through different time periods and dimensions, where your decisions will shape the fate of not just the library but the world outside. Can you outsmart the shadowy figures protecting the library's secrets and solve the mystery before it's too late?