Remembered that I had the CD for Half-Life and learned you can put the CD key in to unlock it. Was surprised that I also unlocked the add-ons with this version. :
Half-Life Adrenaline Pack (International) : Free Download, Borrow, and Streaming : Internet Archive
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To retrieve my first account, Steam asked me the CD-key of a game I bought 15 years ago. And I did it. : r/Steam
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Half-Life: Counter-Strike Retail (2000) - PC Review and Full Download | Old PC Gaming
HALF-LIFE GAME OF The Year Edition (PC 1999) W/Jewel Case & Code $14.95 - PicClick
Just look at these gorgeous Half-Life CD ROMs | Rock Paper Shotgun
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Amazon.com: Half-Life Gunman (Jewel Case) - PC : Video Games
Half-Life: Adrenaline Pack cover or packaging material - MobyGames
CD Half-Life Game of the Year Edition 1998 Halflife Half lIfe HL GOTY valve FPS PC gaming, Video Gaming, Video Games, Others on Carousell
Half-Life Adrenaline Pack PC CD-ROM 3 Disc Set in Jewel Cases & CD Keys | eBay
Steam Community :: Guide :: Half-Life 2 Archive Collection
Please Insert on Half-Life CD by FlamePrincess3535 on DeviantArt
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Found at a thrift store for a dollar. Couldn't pass up half life! : r/ HalfLife
What to do if Half-Life the game on PC asks for a cd key (Cracked) - YouTube
Original Half Life 2 dvd activation | TechPowerUp Forums
Half-Life: Game of the Year Edition cover or packaging material - MobyGames
