Here is the full list of all 50 Persona 4 Golden achievements. It takes around 150-200 hours to unlock all of the achievements on Windows.
Earn all trophies
Defeat Margaret
Create Izanagi-no-Okami
Complete the Persona Compendium
Win the Miracle Quiz Finals
Defeat Izanami
Hear 250 of Rise's navigation lines
Max out all Social Links
Rescue Marie
Secure Tohru Adachi
Register 100 Skill Cards
Read all books
Visit Nanako in the hospital 3 times
Defeat The Reaper
Max out 10 Social Links
Catch the Sea Guardian
Enter a special relationship with someone
Go to 3 movies at 30 Frame
Rescue Nanako Dojima
Finish Aiya's special dish
Max out all social qualities
Make 5 perfect boxed lunches
Buy a special croquette from Sozai Daigaku
Rescue Naoto Shirogane
Switch Personas 5 times in 1 battle
Register over 50% of the Compendium
Perform 50 Persona fusions
Drink the coffee at Chagall Cafe
Secure Mitsuo Kubo
Get 50 Sweep Bonuses
Use 4 or more Personas in a special fusion
Deal over 999 damage in 1 attack
Swing the net with perfect timing
Rank #1 in your class on an exam
Experience a fusion accident
Buy 5 things from Tanaka's Amazing Commodities
Rescue Rise Kujikawa
Max out a Social Link
Buy a Persona from the Compendium
Rescue Kanji Tatsumi
Win a prize from the vending machine
Perform 50 All-Out Attacks
Exploit enemy weaknesses 100 times
Register a Skill Card
Rescue Yukiko Amagi
Defeat a Golden Hand
Buy an item from the Capsule Machine
Fight a battle in costume
Enter a battle with Player Advantage
Obtain the Persona Izanagi