Here is the full list of all 85 Final Fantasy IX achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Win with Vivi during the Festival of the Hunt.
Use the Defend command 50 times.
Synthesize 30 items.
Defeat Behemoth in the Treno weapon shop using Dagger.
Form a party with four male characters.
Summon the eidolon Madeen.
Complete FINAL FANTASY IX.
Enter trance 50 times.
Defeat Lich, the Guardian of Earth.
Summon Eidolons 50 times.
Defeat Kraken, the Guardian of Water.
Defeat Tiamat, the Guardian of Wind.
Defeat Maliris, the Guardian of Fire.
Locate all hidden treasures on the world map.
Obtain the complete set of Genji armor.
Gain the favor of all friendly enemies.
Obtain the Whale Whisker.
Use Blue Magic spells 100 times.
Repair the machine at Mognet Central.
Obtain a bottle of Superslick.
Obtain the Ultima Weapon.
Summon the eidolon Bahamut.
Obtain the Tiger Racket.
Summon the eidolon Leviathan.
Summon the eidolon Odin.
Obtain an airship.
Summon the eidolon Shiva.
Summon the eidolon Atomos.
Summon the eidolon Ifrit.
Summon the eidolon Phoenix.
Win 10 Tetra Master matches.(Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Summon the eidolon Carbuncle.
Use Black Magic spells 100 times.
Summon the eidolon Fenrir.
Synthesize 10 items.
Summon the eidolon Ramuh.
Use the Steal command 50 times.
Free Kuppo from a wall in Fossil Roo.
Guide all the residents of Cleyra to safety.
Defeat 100 enemies.
Successfully catch a golden frog.
Enter Trance for the first time.
Have the nobles demand an encore.
Win a Tetra Master match.
Jump rope 100 times without tripping.
Use White Magic spells 200 times.
Defeat 1000 enemies.
Defeat 10000 enemies.
Purchase all items available from Stiltzkin.
Acquire all available support abilities.
Uncover the secret of the Eidolon Wall.
Cause Moguo to have a tantrum.
Raise your chocobo's beak level to 99.
Visit every beach in Gaia.
Successfully catch 99 frogs.
Win 10 items at the Treno Auction House.
Obtain the sacred blade Excalibur.
Correctly answer all the questions in Ragtime Mouse's pop quiz.
Defeat Ozma.
Obtain a miniature copy of the Prima Vista.
Receive 10 rewards from Queen Stella.
Obtain the Hammer.
Receive certification as a Rank S Treasure Hunter.
Jump rope 1000 times without tripping and obtain King of Jump Rope.
Attain level 99 with at least one character.
Obtain Madain's Ring via mining.
Obtain Athlete Queen.
Beat the Nero Brothers' shuffling game nine times in a row.
Play the blackjack minigame.
Win 100 Tetra Master matches. (Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Receive 30 back attacks.
Form a party with Quina Quen and three female characters.
Have a single character affected by all status ailments. (both beneficial and detrimental).
Activate the Rebirth Flame ability when all party members are incapacitated.
Summon the eidolon Ark.
View 79 Active Time Events.
Obtain 4 moonstones.
Obtain Kain's Lance.
Obtain the Tower.
Obtain the Rune Claws.
Obtain the Angel Flute.
Obtain the Mace of Zeus.
Obtain the Gastro Fork.
Obtain Excalibur II.
Receive a Very Good Omen from a color fortune.