There's no single "invention day" for video games—definition shifts with technology. Here are the widely recognized milestones:
Thomas T. Goldsmith Jr. & Estle Ray Mann patent an analog missile-simulation game using a CRT and knobs. Never commercialized.
William Higinbotham builds a side-view tennis game on an oscilloscope at Brookhaven National Lab for visitors. First interactive graphical game for public play.
MIT students (Steve Russell et al.) create a two-player spaceship duel on a PDP-1. First widely distributed digital video game—spreads to universities.
Nolan Bushnell & Ted Dabney release the first commercial arcade video game (Nutting Associates). Flops commercially but proves coin-op viability.
Atari's breakout hit. Simple, addictive, mass-produced. Launches the arcade industry.
First home video game console. Predates Pong; uses overlays and discrete logic. Commercial footnote but historical first.
Taito's phenomenon. Microprocessor-based, high-score tables, global arcade boom.
Namco's maze chase becomes cultural icon. First gaming mascot, merchandise empire, appeal beyond core players.
Each step built on the last. "Invention" is a continuum—from lab curiosity to global medium.