The first retail copies of Half-Life published by Sierra used a 13-digit numerical code (e.g., 1234-56789-1234 ). These were typically printed on the back of the jewel case or inside the manual.
You found a 25-digit key, but Steam says it is invalid. Here are the three most common reasons why. half life cd key 25 digits
If you are trying to add your old physical copy to your Steam library: Games > Activate a Product on Steam 13-digit retail key exactly as printed (including hyphens if present). Most original Half-Life retail keys will grant you the Half-Life Platinum Pack , which includes Counter-Strike Day of Defeat Team Fortress Classic Steam Community The first retail copies of Half-Life published by
If you already own a physical copy of Half-Life (or Half-Life: Blue Shift , Opposing Force , or the Platinum Pack ), you must locate the key. It will be printed on the CD/DVD itself. Check these locations: Here are the three most common reasons why
: Typically 13 digits, often formatted as XXXX-XXXXX-XXXX .
Because the game is decades old, the market for CD keys is now the Wild West. If you are searching for a 25-digit key to buy right now, be extremely careful.