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