: Look for a printed sticker on the back of the manual or inside the game box.
. These emails typically contain both the download link and the product key. Steam Version: fs 13 product key
If you are moving the game to a new computer, the activation file is often stored locally in your documents folder (e.g., Documents\My Games\FarmingSimulator2013\ ) as a .dat file. Buying a New Key : Look for a printed sticker on the