Unless you are a collector restoring a Windows XP gaming rig from 2008, the Legacy Product Key is obsolete. You cannot play multiplayer with it, you cannot download patches easily, and you cannot access the Steam Workshop.
Many players search for cheap "Product Keys" for Opposing Fronts on eBay or key resellers. Be aware: Company Of Heroes Opposing Fronts Product Key Vs Retail Code
Provide a photo of your physical manual with the Product Key visible. Support agents have a tool to validate old keys and generate replacement Steam keys. Unless you are a collector restoring a Windows
In the context of Company of Heroes: Opposing Fronts , a is specifically the code required for the Legacy Relic Online authentication system . Back in 2007, the game did not rely on Steam. Instead, you installed the game via CD/DVD, and the installer asked for a Product Key to verify you didn't pirate the software. Be aware: Provide a photo of your physical
If Steam rejects your 5×5 Retail Code, you have two options: