The 1990s saw no major “proto-Metaverse” games, but advances continued. That decade, millions of consumers took part in the first isometric 3D (also known as 2.5D) virtual worlds, which gave the illusion of three-dimensional space, but only allowed users to move across two axes. Not long after, full 3D virtual worlds emerged. A number of games, such as 1994’s Web World and 1995’s Activeworlds, also empowered users to collaboratively build a visible virtual space in real time, rather than through asynchronous commands and votes, and introduced a number of graphic/symbol-based tools to make
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