About PlayCSOnline

FreeOpen SourceNo Download21 Languages

PlayCSOnline is a free, browser-based way to play Counter-Strike 1.6 - the legendary team tactical FPS - with no download, no installation, and no Steam account. Open the site, pick a server, and you are in a live multiplayer match in about 30 seconds.

Play CS 1.6 Now

How PlayCSOnline Works

Classic Counter-Strike 1.6 is a native game that needs a download and install. PlayCSOnline runs the same game entirely inside your web browser by combining several open-source technologies:

Game Engine

Xash3D FWGS

An open-source reimplementation of the GoldSrc engine, compiled to WebAssembly so it runs at near-native speed in the browser.

Game Client

cs16-client

An open-source Counter-Strike 1.6 client providing the original weapons, HUD, and gameplay feel.

Networking

WebRTC

Real-time multiplayer runs over WebRTC, so matches work over standard HTTPS without special ports - even on school or office Wi-Fi.

Server Bridge

goxash3d-fwgs

A Go-based bridge connects browser WebRTC clients to standard CS 1.6 dedicated servers.

Built on Open Source

PlayCSOnline stands on the shoulders of the open-source community. We do not hide the technology - you can read and build the same components yourself:

FWGS/xash3d-fwgs - the Xash3D FWGS engine
Velaron/cs16-client - the CS 1.6 WebAssembly client
yohimik/webxash3d-fwgs - the web platform (WASM + WebRTC + Docker)

Counter-Strike and the GoldSrc engine are trademarks of Valve Corporation. PlayCSOnline is an independent, fan-run project and is not affiliated with or endorsed by Valve.

Our Servers

Game Servers

CS 1.6 + Half-Life

Players / Server

Up to 32

Maps

205+

Game Modes

Classic, GunGame, DM, Zombie

Servers run popular modes including Classic bomb-defusal and hostage rescue, GunGame, Deathmatch, and Zombie mode, across classic maps like de_dust2 and de_inferno.

Free, Forever

PlayCSOnline is completely free - no payments, no subscriptions, no microtransactions, and no ads inside matches. You do not need to register: just type a nickname and play. We keep only the minimal anonymous data needed to run the servers; see our Privacy Policy and Terms.

Available Worldwide in 21 Languages

PlayCSOnline is localized into 21 languages including English, Turkish, Russian, Spanish, Portuguese, German, French, Polish, Ukrainian, Chinese, Japanese, Korean, Arabic, Hindi, Italian, Vietnamese, Thai, Czech, Persian, Bengali, and Urdu.

Contact

Questions, bug reports, or feedback? Email [email protected] or use the in-game Report Issue button.

Play Counter-Strike 1.6 Free