Instead, Episode Two was released over a year after Episode One, and Half-Life 2: Episode Three, which was supposed to follow 6 months after Episode 2, has been delayed indefinitely. Originally, Valve intended to release the episodes 6 months apart. This was followed by Half-Life 2: Episode One on June 1, 2006, and Half Life 2: Episode Two on October 10, 2007.
On November 16, 2004, Valve released Half-Life 2, the sequel to the original game. Valve's Half-Life franchise started on November 19th, 1998, and was as well the debut title of Valve Software.