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