The Half-life demo contains new single player levels not in the retail version. However, the demo is a 48 MB download-- not what Half-Lifers who already own the retail like to download conveniently in his\her spare time (unless you have a fast connection). Basically, I ripped the .bsp's (the maps) from the demo's pak0.pak file, and I took the scripts, which is used for events like conversations of non-player characters (aka NPC's), NPC actions, and blackbar titles for introducing and ending a level. It all clocks down to a compressed 3.6 MB file (a little over 7.6 MB after decompression). I used a utility called Winrar to compress the files into a self-extracting archive. You can download Uplink-Lite here (alternate here from Second II Reality, and Digital Players Union have also decided to help out here).
After extracting the file, take the contents of it, and move it to their respective
folders in the half-life\valve directory. Run your
half-life executable (hl.exe) with the console variable, like so
hl.exe -console
If you did it correctly, there should be a box with the word "console" in the
upper-left corner of Half-Life's main menu. Click on it so you go to the console
interface, and type in map hldemo1
I'll now explain where every file belongs, since some people still seem to have problems with it. Be sure to create a subdirectory called sound and maps in your half-life\valve\ folder if there isn't one already; as well as a graphs subdirectory in half-life\valve\maps\
Here goes:
half-life\valve\titles.txt
half-life\valve\sound\sentences.txt
half-life\valve\maps\hldemo1.bsp
half-life\valve\maps\hldemo2.bsp
half-life\valve\maps\hldemo3.bsp
half-life\valve\maps\graphs\hldemo1.nod
half-life\valve\maps\graphs\hldemo2.nod
half-life\valve\maps\graphs\hldemo3.nod
Questions\Comments? Mail me at LrdVaderX@aol.com.