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