: Steam Support frequently uses original physical CD keys as a "lifeline" for account recovery. Providing a photo of the original key inside its box can prove ownership even if your account was compromised years ago. Where to Find Your Key
: Found on the back of the Half-Life CD jewel cases or manuals, these numeric-only keys (formatted as XXXX-XXXXX-XXXX ) were used to play online via the now-defunct World Opponent Network (WON). half life 1 cd key 25 digits
: Printed on the front or back cover of the game manual. : Steam Support frequently uses original physical CD
: A sticker on the back of the plastic CD case, often near the bottom-left. half life 1 cd key 25 digits
For those digging through old collections, you can typically find the key in the following locations: