Counter-Strike: Complete - Condition Zero, Global, Source Steam

This bundle includes the following:

• Counter-Strike (released in 1999).
• Counter-Strike: Condition Zero (released in 2004).
• Counter-Strike: Source (released in 2004).
• Counter-Strike: Global Offensive (released in 2012).

Counter-Strike is one of the famous first-person shooter online multiplayer video game! Many years of gaming tradition and experience made it one of the most desirable video game in recent years.
Counter-Strike: Complete includes three versions of this popular video game:

The first version of Counter-Strike, Counter-Strike: Global Offensive and Counter-Strike: Source contains only singleplayer mode while Counter-Strike: Condition Zero contains both singleplayer and multiplayer modes.

This is one of the most addictive game series in history.