PC release by Nexon with Valve license. New maps and Zombie mode. The client is not in English.
Counter-Strike Online (CSO) is a PC game for the Asian market. Nexon developed it with Valve and released it in 2008 for Windows. Publishers: Nexon (South Korea, Japan), TianCity (China), Gamania (Hong Kong, Taiwan).
It adds new maps, weapons, characters, and a zombie enemy. You can fight against zombies in dedicated modes.
Zombie mode shifts the classic CT vs T setup to infected vs survivors. You can get infected mid-round and switch sides. Core CS gameplay stays. Half-Life is not required.
Language note: the client is not in English. Supported regions use Chinese and Japanese.
To get the latest version, use the official website. Avoid unofficial downloads.
