P4G Golden Ending requirements

Source: https://gamefaqs.gamespot.com/boards/641695-persona-4-golden/75884857

-Max out the Aeon Arcana Social Link with Marie(get this done before December 24th)

-Eventually you'll confront Namatame and be posed the question of: do you throw him in the TV or not? The path you should take is:
1. Any Option
2. Wait a second here...
3. We're missing something.
4. Namatame's true feelings.
5. Something's bothering me.
6. We're missing something...
7. Calm the hell down!

-A bit later you need to confront you're friends on who you think the true culprit is. It is *SPOILER ALERT* Adachi. *SPOILERS END* Share your reasons and then you'll play through the new dungeon. This puts you on route to the Good or True Endings.
Finally, after saying goodbye to your friends at the end, DON'T PICK TO GO HOME. Do not pick to go home ALONE. Go to the Food Court one last time and you'll be going straight for the game's True Ending.