Counter-Strike history

Counter-Strike did not start as a Valve game. It started as a free Half-Life mod that two hobbyists built in the late 1990s, and it got so popular that Valve bought it and hired the people who made it. From there it grew into one of the biggest competitive games on the planet. Here is the whole timeline, from a fan project to CS2. If you want the current picture, see what Counter-Strike 2 is.

It began as a Half-Life mod

Counter-Strike exists because Half-Life shipped with mod tools. In 1999, two developers, Minh "Gooseman" Le and Jess Cliffe, used those tools to build a team-based shooter on top of Valve's engine. One side played terrorists, the other counter-terrorists, and rounds revolved around objectives like planting or defusing a bomb and rescuing hostages.

The first public beta went out in mid-1999 as a free download. It spread fast. Players kept coming back for the tight, unforgiving gunplay and the round-based tension, and new betas rolled out steadily as Le and Cliffe refined it. Because it ran on Half-Life, you needed a copy of Valve's game to play it, which tied the two together from day one. The story of that original game is worth knowing too, and the what is Half-Life guide covers it.

Valve buys the mod and hires the creators

By 2000 the mod was too big to ignore. Valve stepped in, acquired the intellectual property, and brought Minh Le and Jess Cliffe on board. In November 2000 Counter-Strike got a full retail release as a proper standalone product rather than just a mod you bolted onto Half-Life.

That move set the pattern for how Valve would operate for years: watch the modding community, spot the breakout hit, and absorb it. Counter-Strike was the clearest example, and it paid off for decades.

The timeline: 1.6 to Source to CS:GO to CS2

After the acquisition, Counter-Strike went through several major versions. Here is the shorthand history most players know.

1. Counter-Strike 1.6 (2003). The definitive early version, tied to Valve's new Steam platform. For a huge slice of the audience, 1.6 is the game that defined competitive shooters and it still has loyal players today.
2. Counter-Strike: Condition Zero (2004). A release aimed at single-player and bots that sat alongside the multiplayer core.
3. Counter-Strike: Source (2004). A rebuild on Valve's Source engine, the same tech behind Half-Life 2. It modernized the visuals and physics while keeping the familiar maps and rules.
4. Counter-Strike: Global Offensive (2012). Known as CS:GO. It launched across PC and consoles and eventually became free to play. The skin economy, the Major tournaments, and the ranked ladder turned it into a global esport.
5. Counter-Strike 2 (2023). The current version, built on the Source 2 engine. It replaced CS:GO outright in September 2023 as a free upgrade and carried players' inventories forward.

Each jump kept the core intact. The economy round, the bomb sites, the recoil patterns you learn by heart, all of it survived from version to version. That continuity is a big reason the community stayed put across 25 years.

The skin economy and why it stuck around

A huge part of Counter-Strike's staying power is not the shooting, it is the items. CS:GO introduced weapon skins in 2013 through cases and keys, and a real trading market grew around them. Some skins became genuinely valuable, and inventories turned into something players actually track and manage.

That economy carried straight into CS2. If you want to see what your own collection is worth, our CS2 inventory value tool prices it up for you. It is a good reminder that Counter-Strike stopped being just a game a long time ago and became a whole ecosystem.

Talk to longtime players on the Steam and community forums and you hear a consistent theme: a lot of them started on 1.6 in an internet cafe or a LAN party, drifted through Source and CS:GO, and are still around for CS2. The nostalgia for 1.6 in particular runs deep, and the game's 25th anniversary in 2025 brought a lot of that history back to the surface.

FAQ

Is Counter-Strike based on Half-Life? Yes. It began in 1999 as a mod built on Valve's Half-Life engine, and you needed Half-Life to play the early versions.

Who created Counter-Strike? Minh "Gooseman" Le and Jess Cliffe made the original mod. Valve later acquired it and hired both of them.

When did Valve buy Counter-Strike? Valve acquired the rights around 2000 and released the standalone retail version in November of that year.

What is the order of the Counter-Strike games? The core line runs Counter-Strike 1.6, Condition Zero, Counter-Strike: Source, Counter-Strike: Global Offensive, and Counter-Strike 2.

Is CS:GO still playable? No. Counter-Strike 2 replaced CS:GO in September 2023. The old game was upgraded into CS2 rather than kept running alongside it.