Blue Shift, the 2nd of the three Gearbox expansions for Half-Life, re-tells the story of the Black Mesa Incident from Barney Calhoun's perspective. While undeniably short it stays true to the original Half-Life, in my opinion far closer than Opposing Force and Decay, as such if you enjoyed Half-Life you'll likely enjoy Blue Shift.

I'd also like a moment to address those calling this lazy. Specifically complaints about lack of added content. Turn your attention to the High Definition Pack, which initially came with Blue Shift (now implemented in all HL steam releases) which added the option for HD models (found within settings) for each of the PC Half-Life games. Various changes were included, most notably increased polygon count on both character and weapon models. You can read more about this here.[half-life.wikia.com]

[b]Blue Shift[/b], the 2nd of the three Gearbox expansions for Half-Life, re-tells the story of the Black Mesa Incident from Barney Calhoun's perspective. While undeniably short it stays true to the original Half-Life, in my opinion far closer than Opposing Force and Decay, as such if you enjoyed Half-Life you'll likely enjoy Blue Shift. I'd also like a moment to address those calling this lazy. Specifically complaints about lack of added content. Turn your attention to the High Definition Pack, which initially came with Blue Shift (now implemented in all HL steam releases) which added the option for HD models (found within settings) for each of the PC Half-Life games. Various changes were included, most notably increased polygon count on both character and weapon models. You can read more about this [url=http://half-life.wikia.com/wiki/Half-Life_High_Definition_Pack]here.[/url]