The first official Half-Life expansion.
This time centered on Adam Shephard, a member of the HECU to elminate the Xen and try to stop the invasion, and people to silence everyone that know what happen on Black Mesa. Our main order is to kill Gordon Freeman, the main character of Half-Life. Everything occurs after the events of the "Resonance Cascade" of the first game.
It's basically more Half-Life with a few weapons (and changed) added and a very interesting story on Shephard.
It was made by Gearbox as an official expansion to the Half-Life games meanwhile Valve was working on Source, their next game engine and probably Half-Life 2.
This time centered on Adam Shephard, a member of the HECU to elminate the Xen and try to stop the invasion, and people to silence everyone that know what happen on Black Mesa. Our main order is to kill Gordon Freeman, the main character of Half-Life. Everything occurs after the events of the "Resonance Cascade" of the first game.
It's basically more Half-Life with a few weapons (and changed) added and a very interesting story on Shephard.
It was made by Gearbox as an official expansion to the Half-Life games meanwhile Valve was working on Source, their next game engine and probably Half-Life 2.