Here is the full list of all 15 Best Friend Forever achievements.
Complete Robin’s romance route.
Reach Level 10 in your dog’s Fitness trait.
Adopt your first best friend forever.
Complete Maribel’s romance route.
Go on a date with every love interest.
Complete Anders’ romance route.
Complete Astrid’s romance route.
Complete Felix’s romance route.
Complete Sacha’s romance route.
Reach Level 10 in your dog’s Manners trait.
Reach Level 10 in your dog’s Smarts trait.
Reach Level 10 in your dog’s Sociability trait.
Reach Level 10 in your dog’s Trust trait.
Pat the dog a thousand times. You okay over there, buddy?
Become the valedictorian of your Paws Academy class.