To link a legacy Fallen Earth Account follow these steps.
1. Create a Gamersfirst account at:
https://www.gamersfirst.com/register/index.php If you already have one proceed to step 2.
2. Visit the following page and log in with your Gamersfirst account:
3. Enter your Fallen Earth username and password in the respective fields and click Continue. (User name and password are case sensitive.)
4. Confirm your characters being transferred and click the Merge button to complete the process.
Your Legacy Fallen Earth and Gamersfirst account should now be linked. From now on please use your Gamersfirst email for your Fallen Earth Account username and the password you chose on your Gamerfirst account to log into the Fallen Earth client.