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