How to Find Radagos
You must complete Rebuild Your Clan before you can acquire this quest. You’ll need to increase your denars by 1000, recruit 20 troops, reach clan tier 1, and hire one companion to successfully rebuild your clan. Once done, you can visit any large settlement to meet Radagos and trigger the Rescue Your Family quest.
Attack Galter’s Hideout
When you speak with Radagos he’ll tell you that he knows where your siblings are and that he’s willing to show you under one condition: that you allow him to execute Galter, the slaver who kidnapped your family. The dialogue is fairly linear and will inevitably result in you agreeing to meet Radagos at a nearby hideout, where Galter is located. The hideout will be added to your tracker automatically, so it will be easy to find. In any case, it won’t be far from the settlement where you first meet Radagos. It’s worth making a hard save immediately after speaking with him, just in case the fight ahead doesn’t go as planned.
After speaking with Radagos you’ll need to travel to the nearby hideout to confront Galter and his warriors. You can choose 10 troops of your own (including companions) to attack Galter’s small force. This should be an easy task, since there aren’t many troops at the hideout. You’ll have to wait until nightfall to attack the hideout, at which point you can begin to eliminate the small number of enemy bandits at each camp within the hideout. When all the bandits are dead, Galter will reveal himself and challenge you to a duel. You can accept this and beat him alone for a boost to your renown and morale, or you can attack Galter with all your troops to get the job done quickly and ensure success.
Spare or Kill Radagos?
Once you’ve defeated Galter and got your family back, Radagos will execute Galter. You’ll then have a brief conversation with one of your family members, as they tell you that they’ll wait for you at the nearest settlement. All that remains now is for you to decide what to do with Radagos. If you kill him, that will be the end of his story and you will never see him again. If you spare him there are no known consequences, but you may see him roaming the landscape and building a clan of his own, in time.
Where to Find Your Family
When you’ve dealt with Radagos, the quest will complete. However, you’re not done yet! You still need to meet your siblings at the nearest town and recruit them into your clan. They should be found at the tavern in the settlement where you first met Radagos when he offered to help you find your family. At this stage you’ll only be able to recruit your brother into your clan, as your younger siblings are too young to be recruited. You can keep track of their progress to adulthood from the Clan tab (press “L” button on your keyboard to access it by default). Once you’ve recruited your brother you should consider providing him with decent gear and assigning him to a role as soon as possible. This will make use of his skills, which you will find are among the best of your companions.
If you were unable to find your brother at the tavern in the settlement where you met Radagos, they may have moved on. Fortunately, you can see their location from the Clan tab at any time, so be sure to check that if you need to.