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