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