The "True Champion" achievement in Dying Light 2's Bloody Ties DLC is for getting gold medals on all 12 of the big challenges. You'll be able to start getting medals on these once you've gone through all of them once during the story, and then you can start replaying them by heading over to their posters on the wall and choosing one to replay. I'll be creating video guides showing how you can complete each of these with a gold medal so feel free to check out each video for whichever challenge you're having trouble with.
