One of the clearest examples of how a mod for a game (Half Life) becomes a separate game, and at the same time is not inferior in popularity and greatness to its parent. Version 1.6 became the most widespread all over the world, very soon after the release of CS became the main team game in e-sports. And she remained so for a very long time...
In general, explaining what Counter Strike is is not a grateful task. Some will react with bewilderment, saying, “He really explains what “Contra” is?! The reaction of others will be: “What CS? What kind of esports? What kind of game industry is this? WHAT AM I EVEN DOING HERE? There is no third option.
Staying true to its roots, Counter Strike itself spawned a lot of modifications, and remains popular 15 years after its release.