Half Life came out in 1998. The game during that year doesn't have great graphics to begin with. I've played it on a computer with Widows XP, Vista, and Windows 7.
If you do buy it you'll have to register it on
Welcome to Steam and play through Steam.
System Requirements:
Minimum: 500 mhz processor, 96mb ram, 16mb video card, Windows 2000/XP, Mouse, Keyboard, Internet Connection
Recommended: 800 mhz processor, 128mb ram, 32mb+ video card, Windows 2000/XP, Mouse, Keyboard, Internet Connection
*info from the
Steam Store.