This tree diagram visualizes the evolution of gaming from a single root through spatial dimensions (1D to immersive VR/AR), branching into genres and specific game titles with release dates. The data is provided as a flat array of objects, which d3.hierarchy and d3.tree convert into a hierarchical layout. The SVG rendering uses d3.linkHorizontal for curved connector paths and d3.select to append labeled nodes, with styling applied via CSS classes. Titles include games like Pong, Super Mario Bros., and Half-Life: Alyx, showing the progression of gaming complexity over decades.