"Counter-Strike" is one of the most influential and enduring first-person shooter (FPS) video game series in the industry. The series was originally developed as a mod for the popular game "Half-Life" by Minh Le and Jess Cliffe and later acquired by Valve Corporation.

The "Counter-Strike" series is known for its emphasis on strategy, tactics, and team cooperation. In "Counter-Strike," players are divided into two teams, terrorists and counter-terrorists, and must complete specific objectives or eliminate the opposing team. The game is notable for its economy system, allowing players to earn money based on in-game performance and use it to buy better weapons and equipment.

Some of the most well-known titles in the "Counter-Strike" series include:

Counter-Strike 1.6 is the original version of the game, released in 1999 as a mod for "Half-Life" and later as a standalone game.

Counter-Strike: Source: This title, released in 2004, brought the game onto an updated version of the "Half-Life 2" game engine.

Counter-Strike: Global Offensive (CS:GO) is the latest iteration of the series, released in 2012. CS:GO introduced graphical improvements, new gameplay modes, and has continued to be a prominent presence in eSports, with high-level competitive tournaments held worldwide.

The "Counter-Strike" series has had a significant impact on the culture of competitive online gaming and has been a cornerstone of eSports. The game has a dedicated player community and continues to be updated and supported by Valve Corporation.