Here is the full list of all 32 Final Fantasy VII trophies - there are 13 bronze, 13 silver, 5 gold and 1 platinum.
Obtain all trophies
Defeat the Ruby Weapon
Obtain 99,999,999 gil
Obtain the Master Summon Materia
Defeat the Emerald Weapon
Learn Omnislash—Cloud's last Limit Break
Complete FINAL FANTASY VII
Learn Chaos—Vincent's last Limit Break
Reach Lv. 99 with one character
Learn Highwind—Cid's last Limit Break
Learn All Creation—Yuffie's last Limit Break
Defeat the Diamond Weapon
Obtain the Bahamut ZERO Materia
Learn Final Heaven—Tifa's last Limit Break
Obtain the Knights of the Round Materia
Score 10,050 points or more in G-Bike at the Gold Saucer
Win the Chocobo Racing mini-game
Learn Catastrophe—Barret's last Limit Break
Learn Slots—Cait Sith's last Limit Break
Raise a Materia to Lv. 5
Obtain the Leviathan Materia
Have Yuffie join your party
Obtain the Bahamut Materia
Learn Great Gospel—Aeris's last Limit Break
Learn Cosmo Memory—Red XIII's last Limit Break
Go on a date with Barret in the Gold Saucer
Have Vincent join your party
Use a summon Materia in battle
Get Don Corneo to choose Cloud over the two females
Use a Limit Break
Have your whole party fall in battle
Emerge victorious from your first battle