From Half-Life mod to CS2 — 25 years.

In June 1999, Minh "Gooseman" Le and Jess Cliffe released the first beta of Counter-Strike — a free Half-Life mod. The premise: terrorists vs counter-terrorists, plant or defuse the bomb. The mod was distributed via FilePlanet and CS-NATION; players had to own Half-Life to play.

Through 1999 and 2000, the mod went through six betas, each adding maps, weapons, and refining the gunplay. Beta 6.0 (October 2000) added de_aztec and the standard 5-on-5 competitive format. Player counts climbed into the hundreds of thousands.

Valve noticed. In April 2000, they hired Le and Cliffe and announced they'd publish Counter-Strike as a standalone product. The mod era ended when CS 1.0 launched November 9, 2000.

CS 1.0 evolved into 1.1 (June 2001), 1.3 (September 2001), 1.5 (June 2002), and finally 1.6 (September 2003). Each version refined gunplay, adjusted weapon balance, and added maps. By 1.6, the modern CS rule set was locked in.

CS 1.6 became the dominant esports title for the entire 2000s decade. The World Cyber Games featured it as a main title from 2001-2010. ESL Pro Series, CPL Winter, IEM, and a hundred regional leagues kept the scene alive.

The pro era of 1.6 saw legendary teams: SK Gaming (Sweden), 4Kings (UK), Mibr (Brazil), NaVi (Ukraine, who won the 2010 World Championship), fnatic, Mousesports. Player names like NEO, F0rest, GeT_RiGhT, NaVi's Edward — these are the founding fathers of CS esports.

Counter-Strike: Source launched November 2004 alongside Half-Life 2 — same gameplay on the new Source engine. But the pro scene refused to migrate. 1.6 stayed as the competitive standard until CS:GO's 2012 launch.

CS:GO launched August 21, 2012 on PC, Mac, Xbox 360, and PS3. Launch reception was lukewarm — pros didn't want to leave 1.6 / Source, console players found the gameplay punishing. Player numbers in the first year were low.

The Arms Deal update (August 2013) introduced weapon skins, the Steam Marketplace integration, and case-key opening. This was the inflection point — skins became a $1B+ economy and casual players flooded in for cosmetics.

The first CS:GO Major was DreamHack Winter 2013 (November 2013) with a $250,000 prize pool. fnatic won, beating NiP in the final. The Major format was set.

2014 and 2015 saw fnatic's era: 3 of the first 4 Majors, a roster (olofmeister, KRiMZ, JW, flusha, pronax) still cited as one of the greatest of all time. The first $1M prize pool came at IEM Katowice 2017, but the $250K pools of 2014 made esports careers viable.

In 2016, Valve doubled CS:GO Major prize pools to $1M (MLG Columbus 2016). The Brazilian era began with Luminosity (later SK Gaming) winning back-to-back Majors with coldzera as MVP. This was the first time the prize pool actually rivaled traditional sports.

Astralis took over from 2018-2019. Their utility-first style, gla1ve's IGL calls, and the consistency of dupreeh + device + Magisk made them the longest-running #1 team in CS history (11 months continuous in 2018). They won 4 Majors total — a record nobody has matched.

s1mple (Aleksandr Kostyliev) emerged as the player of the era. His individual brilliance carried NaVi to multiple finals despite team issues. The "s1mple vs Astralis" rivalry defined competitive CS for two years.

December 2018: CS:GO went free-to-play. The community was already at peak engagement; the change locked it in.

COVID-19 forced online events from March 2020. Pro CS adapted but Major schedules slipped. PGL Stockholm Major 2021 was the first post-pandemic in-person Major; NaVi won, s1mple MVP. PGL Antwerp 2022 followed (FaZe). IEM Rio 2022 (Outsiders, before Outsiders became Virtus.pro again).

BLAST took over Major hosting. BLAST.tv Paris 2023 became the last CS:GO Major (Vitality wins). By this point Valve had been silently developing Source 2 CS for over two years; the rumour mill was constant.

In March 2023, Valve announced Counter-Strike 2 with a "Limited Test" invitation system. Within hours, code references for CS2 leaked from the CS:GO client itself. The community knew CS:GO's end was coming.

CS2 replaced CS:GO entirely on September 27, 2023 — a free auto-update. Source 2 engine, volumetric smokes, sub-tick servers, MR12 format. Within a week, concurrent player count was back near CS:GO's peak (~1.6M).

The first CS2 Major was PGL Major Copenhagen 2024 (March 2024). NaVi won 2-0 vs FaZe with iM as MVP. The roster included w0nderful, jL, b1t, makazze — a near-complete rebuild from the 2021 NaVi lineup.

Team Spirit emerged as the new dominant force. Their young roster (donk at 17, sh1ro, chopper) won Perfect World Shanghai Major 2024 in December. donk became the youngest Major MVP ever. The "Russian academy" pipeline produced extraordinary talent.

CS2 is now in its mature phase. Train returned to active duty in late 2024. M4 weapons received balance tweaks in early 2025. The active duty pool is stable: Mirage, Inferno, Dust 2, Nuke, Ancient, Anubis, Vertigo, Train, Overpass.

BLAST.tv Austin Major 2025 (June) brought CS to the United States again, ZywOo MVP. The international scene now includes serious Asian roster development (The MongolZ in particular).

Counter-Strike will hit its 26th anniversary in June 2025. From a Half-Life mod to a billion-dollar esports ecosystem, with a single core gameplay loop that hasn't fundamentally changed in 25 years. The terrorists still want to plant the bomb. The counter-terrorists still want to defuse it.