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
Read all books
Defeat Izanami
Complete the Persona Compendium
Win the Miracle Quiz Finals
Register 100 Skill Cards
Max out all Social Links
Defeat The Reaper
Rescue Marie
Drink the coffee at Chagall Cafe
Secure Tohru Adachi
Catch the Sea Guardian
Max out 10 Social Links
Visit Nanako in the hospital 3 times
Go to 3 movies at 30 Frame
Rescue Nanako Dojima
Hear 250 of Rise's navigation lines
Finish Aiya's special dish
Max out all social qualities
Enter a special relationship with someone
Rescue Naoto Shirogane
Deal over 999 damage in 1 attack
Register over 50% of the Compendium
Perform 50 Persona fusions
Max out a Social Link
Secure Mitsuo Kubo
Use 4 or more Personas in a special fusion
Experience a fusion accident
Rank #1 in your class on an exam
Swing the net with perfect timing
Make 5 perfect boxed lunches
Buy 5 things from Tanaka's Amazing Commodities
Rescue Rise Kujikawa
Get 50 Sweep Bonuses
Buy an item from the Capsule Machine
Win a prize from the vending machine
Buy a special croquette from Sozai Daigaku
Buy a Persona from the Compendium
Rescue Kanji Tatsumi
Register a Skill Card
Fight a battle in costume
Defeat a Golden Hand
Rescue Yukiko Amagi
Perform 50 All-Out Attacks
Exploit enemy weaknesses 100 times
Enter a battle with Player Advantage
Switch Personas 5 times in 1 battle
Obtain the Persona Izanagi