hl:bs hlbs blue_shift
Expansion pack for the game [[Half-Life 1]], in which you play as [[Barney Calhoun]] on the day of the resonance cascade.

h4. See also
* [[Half-Life (series)|]]
* [[Half-life: Opposing Force]]
* [[Half-Life: Decay]]

h4. External links
* Combine Overwiki: "Half-Life: Blue Shift":[https://combineoverwiki.net/wiki/Half-Life:_Blue_Shift]
half-life: blue shift