Half-Life (stylized as HλLF-LIFE) is a science fiction first-person shooter video game developed by Valve, released in 1998 by Sierra Studios for Microsoft Windows.
Playlist:
• Half-Life (Source) Walkthrough [PC]
Release Date: 19.11.1998 (PC Microsoft Windows), 11.11.2001 (PS2), 14.02.2013 (PC Linux)
Platform: PC (Microsoft Windows, Linux), PS2
Developer: Valve
Publisher: Sierra Studios, Valve