Based on a mod released for the game Half-Life on June 19, 1999, Counter-Strike is a popular series of first-person shooter video games developed by Valve. The competitive online multiplayer rounds face a team of counter-terrorists against bomb and hostage threats.
- Counter-Strike (November 8, 2000)
- Counter-Strike: Condition Zero (March 2004)
- Counter-Strike: Source (November 2004)
- Counter-Strike: Global Offensive (August 2012)
The Counter-Strike series, especially Counter-Strike: Global Offensive, has a reputation for the trading of rare cosmetic skins. These are earned through a controversial loot box system and are traded with other users through Steam.