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