A strange little side quest
Zombie Mission WebGL may feel immediate, but the ideas around action games have been evolving for a very long time. Gun Fight reached arcades in 1975 and became the first arcade video game to use a microprocessor. And then there is this: Spacewar! appeared on MIT's PDP-1 in 1962 and became one of the earliest influential computer games shared among programmers. The screen is modern; the urge to test skill, pattern and timing definitely is not.