
22 1| Literature Review
Virtual Worlds
Below, the concepts of virtual worlds and, more specifically, metaverse platforms will be
illustrated: they will be the heart of the thesis. We will start with the history, that is,
when the first virtual worlds began to develop, up to a brief explanation of the fundamen-
tal technologies for understanding how, currently, various metaverse platform operate-
User Generated Content (UGC), blockchain and Non Fungible Tokens (NFTs). Virtual
worlds form the foundation of the metaverse, serving as environments where users can
interact, create, and explore simulated realities. Matthew Ball highlights that virtual
worlds encompass any computer-generated environment: from immersive 3D spaces to
the simplest text-based simulations. These worlds can exist independently or be overlaid
onto the physical world through augmented reality, offering a versatility that goes beyond
mere video game entertainment. Historically, virtual worlds were primarily designed for
video games or cinematic purposes, such as The Legend of Zelda or Disney Pixar films.
However, their use has expanded significantly. Today, they are used for a wide range of
purposes, including education, socialization, commerce, and urban planning. For exam-
ple, a digital twin of Hong Kong International Airport was created to simulate passenger
flow and operational scenarios, supporting the decision-making process in the real-world
context. Similarly, entire cities are recreated as virtual worlds and connected to real-
time data streams, allowing urban planners to optimize traffic management, emergency
response, and construction projects (Girginova, 2025).
These worlds are a crucial element of the metaverse thanks to their intrinsic characteristics
of persistence, immersion, and transactional capabilities. According to a report from the
Osservatorio Realtà Aumentata in the School of Management, Politecnico di Milano, to be
part of the metaverse, virtual worlds must possess eight fundamental characteristics: per-
sistence, accessibility, immersion, modularity, interoperability, transactional capabilities,
asset ownership, and representation through avatars. Of the 141 virtual worlds identified
by the Politecnico’s Observatory, only 44 percent are "Metaverse Ready," meaning they
possess the required characteristics such as persistence, economic activity, and interoper-
ability between platforms. Significant examples include platforms such as Decentraland
and The Sandbox. Other virtual worlds, such as Horizon Worlds, are classified as "Open
Worlds," which, despite not having full interoperability, remain modular and immersive
(Osservatori Digital Innovation, 2024a). A key feature of virtual worlds is their adapt-
ability both in design and purpose. They can replicate real environments as digital twins,
for example, to simulate a city’s infrastructure, or represent completely fictional settings
where the impossible becomes the norm. The purposes of these worlds vary greatly, rang-
ing from playful objectives—such as winning or solving puzzles—to non-playful uses like