Full list of all 31 Final Fantasy VII achievements worth 1,000 gamerscore. It takes around 25-30 hours to unlock all of the achievements on Xbox One.
Learn Final Heaven—Tifa's last Limit Break
Learn Catastrophe—Barret's last Limit Break
Learn Omnislash—Cloud's last Limit Break
Raise a Materia to Lv. 5
Defeat Diamond Weapon
Obtain the Bahamut ZERO Materia
Use a summon Materia in battle
Obtain the Bahamut Materia
Obtain the Leviathan Materia
Have your whole party fall in battle
Learn Great Gospel—Aeris's last Limit Break
Learn Slots—Cait Sith's last Limit Break
Have Vincent join your party
Win the Chocobo Racing mini-game
Score 10,050 points or more in G-Bike at the Gold Saucer
Have Yuffie join your party
Get Don Corneo to choose Cloud over the two females
Use a Limit Break
Emerge victorious from your first battle
Go on a date with Barret in the Gold Saucer
Obtain 99,999,999 gil
Reach Lv. 99 with one character
Obtain the Knights of the Round Materia
Learn Cosmo Memory—Red XIII's last Limit Break
Learn All Creation—Yuffie's last Limit Break
Learn Chaos—Vincent's last Limit Break
Learn Highwind—Cid's last Limit Break
Complete FINAL FANTASY VII
Obtain the Master Summon Materia
Defeat Ruby Weapon
Defeat Emerald Weapon