How To Install.
1.)Download and install Steam. Here is the link of Steam:
Store.steampowered.com
2.)Launch Steam.
3.)Buy( if you haven't purchase it ) and install Half-Life 2 in your Steam Games Library.
4.)Then install Source SDK Base 2013 Singleplayer from your Steam Tools Library.
5.)Once it finished installing, right click on this tool, select "Properties".
6.)You will see the field, called "BETAS".
7.)In "Select the beta you would like to opt into" select to "upcoming".
8.)It will update the Source SDK Base 2013 Singleplayer.
9.)Quit Steam.
10.)Download "hl1_update.rar" in provided above link.
11.)Once it finished downloading, open this "hl1_update.rar" with WinRAR program.
12.)You will see the "hl1_update" folder in this "hl1_update.rar".
13.)Extract the "hl1_update" folder to your "sourcemods" directory, for example:
D:\Steam\steamapps\sourcemods
14.)Once it finished extracting, launch Steam.
15.)Go to Steam Games Library and you will see "Half-Life: Source Update".
16.)Double left-click on it.
17.)Play.
