Counter-Strike may not have been the first mod to make it big, but it may be the longest-running. Created by Minh "Gooseman" Le and Jess "Cliffe" Cliffe in 1999, it modded the original Half-Life into the familiar terrorists vs counter-terrorists game that we all know today. One year, in 2000, Valve bought the rights to the mod and hired its developers. SInce then, the company has released Counter-Strike: Condition Zero, Counter-Strike Source, and COunter-Strike Global Offensive. Almost every release of the game still has a group of dedicated fans playing it today.