Sierra On-Line and Gearbox Software have announced Blue Shift, which is an all-new single player episode which allows players to interact with new characters and explore restricted areas of the Black Mesa Research Facility.

In addition to the entirely new Blue Shift episode, the package also includes support for online play and the Half-Life HD Pack, which automatically upgrades the weapons and characters of all the games in the Half-Life series with new high definition content.

Half-Life: Blue Shift is a stand-alone product that does not require Half-Life to play. The title is scheduled to be released in June 2001 - further details about Blue Shift can be found at the official Blue Shift website.