Counter-Strike Online 2 Overview Counter-Strike Online 2 Free Download for PC is a first-person shooter video game and is the sequel to the 2008 game Counter-Strike Online. Diablo Swing Orchestra Remaster. It is targeted towards Asia's gaming market. The game implements the Source engine allowing for better graphics compared to its predecessor and more complex equipment and weapons. The game uses the free-to-play and micropayment business model, similar to its predecessor. After a period of open beta testing, it was released in December 2013 in South Korea and China.