Visit the official Giants Software "Shop" archive page (usually hidden in their support section). As of 2025, they have removed direct purchase links, but they still offer paid DLC keys for FS 13. They do not sell the base game key anymore.
A product key (also known as a CD key or activation code) is a specific alphanumeric string—typically 20-25 characters long—that proves you have legally purchased a copy of Farming Simulator 13. When you install the game from a disc or digital download, the software asks for this key to unlock the full version.
For FS 13, the key format looks something like this: AAAAA-BBBBB-CCCCC-DDDDD-EEEEE. fs 13 product key
Without a valid key:
This is the most common FS 13 error. It means: Visit the official Giants Software "Shop" archive page
If you search for "FS 13 product key," you will inevitably stumble upon websites claiming to have a key generator (keygen) or a list of "100% working" free keys. Do not use these.
Here is what actually happens when you try to use a keygen: If you search for "FS 13 product key,"
Bottom line: There is no such thing as a legitimate free FS 13 product key generator. If it sounds too good to be true, it is a trap.
If you purchased FS 13 on Steam, you generally do not need a manual key to install or play the game through the Steam client. However, if you are trying to convert your Steam version to a standalone version, or if a specific mod requires it, you can find your CD key: