Story related achievement...
*** Spoiler - click to reveal ***After arriving to Ironrath you'll be at a hall with Maester Ortengryn taking care of your leg (putting maggots in your wound). As you soon as you regain control of Gared, move around the hall to learn about the Forrester's and his now Lord, Ethan. Don't forget to take the bandages and herbs from the table in front of Ortengryn, and talk to him when you are ready. Lady Elissa will arrive, give her the sword but don't tell her about the Groove. After a few discussions between your uncle Duncan and Ser Royland they decide to send Gared to the Wall. When you are alone with your uncle tell him about the North Groove and fullfill your promise.