The game has been expanded into a series since its original release, which currently includes Counter-Strike: Condition Zero, Counter-Strike: Source, and Counter-Strike: Global Offensive.

A player can choose to play as one of eight different default character models ( four for each side, although Counter-Strike: Condition Zero added two extra models, bringing the total to ten ).

** Counter-Strike: Condition Zero, Counter-Strike: Source and Counter-Strike: Global Offensive, subsequent versions of Counter-Strike.

On August 18, 2004, the beta was released to owners of Counter-Strike: Condition Zero and those who had received a Half-Life 2 voucher bundled with some ATI Radeon video cards.

Counter-Strike: Condition Zero ( CZ or CS: CZ ) is a multiplayer video game and the follow-up to Counter-Strike.

Unlike other Counter-Strike games, Condition Zero also contains a single-player mission pack with the player playing as counter-terrorist alongside bots.

Counter-Strike bots are a prominent part of Condition Zero gameplay.

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* Counter-Strike ( port ) – ( 2003 ) ( Xbox )

* November — Counter-Strike: Source and Half-Life 2 are officially released on PC around the world, bringing in a new era for the First Person Shooter genre of video game, with advanced graphics & physics.

When Counter-Strike was published by Sierra Entertainment / Vivendi Universal Games, it was bundled with Team Fortress Classic, Opposing Force multiplayer, and the Wanted, Half-Life: Absolute Redemption and Firearms mods.

On August 12, 2011, it was confirmed that a new Counter Strike game was in development at Valve Software and Hidden Path Entertainment, which also codevelops Counter-Strike: Source, going under the title Global Offensive.

The New York Times reported that E-Sports Entertainment ESEA League started the first professional fantasy e-sports league in 2004 around the game of Counter-Strike.

Developers such as Blizzard Entertainment, id Software, Valve Software, Bethesda Softworks, Firaxis, Crytek, The Creative Assembly and Epic Games provide extensive tools and documentation to assist mod makers, leveraging the potential success brought in by a popular mod like Counter-Strike.

From 2007 to 2011, WeMade Entertainment operated a professional gaming team called WeMade FOX that maintained high-ranking Counter-Strike, StarCraft: Brood War and Warcraft III players.

On June 19, 1999, the first public beta of Counter-Strike was released, followed by numerous further " beta " releases.

Counter-Strike received a major technology update and refresh on November 1, 2004 with the release of Counter-Strike: Source, which was heavily updated using Valve's Source game engine to take advantage of more modern graphics and audio hardware.

Counter-Strike was originally played online through the WON gaming service, which was shut down in 2004, forcing players to switch to Steam.

Counter-Strike faced controversy in April 2007 when Jack Thompson, now a disbarred attorney from Florida, predicted that the perpetrator of the Virginia Tech Massacre had been trained to kill in the game, well before Seung-Hui Cho ( the shooter ) was identified.

As of June 18, 2009, a regional federal court order lifting the prohibition on the sale of Counter-Strike was published.

Half-Life: Counter-Strike, a mod of Half-Life ( 1998 ), was the most popular multiplayer game of its era.

For much of its early history, Team Fortress Classic was second only to Counter-Strike as the most played and popular of online games.

Among popular mods, none is more well known than the Half-Life multiplayer mod Counter-Strike, which was released shortly after the original game, and upwards of 1 million games per day are hosted on dedicated servers.

CrossOver Games, announced on 10 March 2008, was a new product that let the users play a broad range of games, " particularly games with a lot of replayability such as MMOs like World of Warcraft and the range of games from Valve e. g., Team Fortress 2, Counter-Strike: Source, and so on ".

Beta 3. 0 was released in July 2002 and added the Allied Sergeant, who carried a M3 Grease Gun, as well as the para gameplay mode which was similar to Counter-Strike in that players did not respawn until the end of the round.

The first time the World e-Sports Games took place, was January 30 through March 20, 2005 and featured Counter-Strike and Warcraft III: Reign of Chaos as main titles.

This pushing back of HL2s release date came in the wake of the cracking of Valve's internal network through a null session connection to Tangis which was hosted in Valve's network and a subsequent upload of an ASP shell, resulting in the leak of the game's source code and many other files including maps, models and a playable early version of Half-Life Source and Counter-Strike Source in early September 2003.

The Steam client was first made available for download in 2002 during the beta period for Counter-Strike 1. 6.

Installation and use of Steam was mandatory for Counter-Strike 1. 6 beta testers, but Steam remained an optional component.

Counter-Strike: Source was initially released as a beta to members of the Valve Cyber Café Program on August 11, 2004.

It was expected to have a release in early 2003 with a secondary multiplayer mode, and developed alongside the Xbox version of Counter-Strike.