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