Counter Strike Online (CSO) is a free-to-play Counter Strike MMOFPS licensed by Valve Software to Nexon Corporation, released in 2008.

Start out by checking out the weapons, classes, game modes, unboxing and many more in Counter Strike Online or Counter Strike Nexon.

Find out more about all available game modes in Counter-Strike Online or Counter-Strike Nexon.

Download Counter Strike Online (CSO) or Counter Strike Nexon (CSN) with step-by-step tutorial provided.

Discover the list of Player Versus Player (PVP) game modes in Counter Strike Online (CSO) or Counter Strike Nexon, including zombie mode.

Step-by-step tutorial to download Counter Strike Online (CSO) English version, or Counter Strike Nexon.

Learn more about how Counter-Strike Online or Counter-Strike Nexon works through its user interface.

The complete list of Casual game modes available in Counter Strike Online (CSO) or Counter Strike Nexon (CSN).

Step-by-step tutorial to download Counter Strike Online (CSO) China, or 反恐精英 Online.

Create your own maps and game modes with Studio exclusively on Counter Strike Online (CSO) or Counter Strike Nexon (CSN)!