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.
Receive a Very Good Omen from a color fortune.
Jump rope 1000 times without tripping and obtain King of Jump Rope.
Jump rope 100 times without tripping.
Defeat Lich, the Guardian of Earth.
Defeat Kraken, the Guardian of Water.
Synthesize 30 items.
Defeat Tiamat, the Guardian of Wind.
Obtain the Rune Claws.
Obtain the Angel Flute.
Defeat Maliris, the Guardian of Fire.
Summon the eidolon Ifrit.
Obtain Kain's Lance.
Summon the eidolon Madeen.
Obtain the Ultima Weapon.
Defeat Behemoth in the Treno weapon shop using Dagger.
Use White Magic spells 200 times.
Summon the eidolon Phoenix.
Attain level 99 with at least one character.
Cause Moguo to have a tantrum.
Form a party with four male characters.
Summon the eidolon Bahamut.
Obtain the complete set of Genji armor.
Locate all hidden treasures on the world map.
Obtain the Whale Whisker.
Obtain the Tiger Racket.
Obtain an airship.
Summon the eidolon Leviathan.
Summon the eidolon Shiva.
Summon the eidolon Atomos.
Summon the eidolon Carbuncle.
Summon the eidolon Odin.
Summon the eidolon Fenrir.
Summon the eidolon Ramuh.
Use Black Magic spells 100 times.
Free Kuppo from a wall in Fossil Roo.
Synthesize 10 items.
Use the Defend command 50 times.
Defeat 100 enemies.
Successfully catch a golden frog.
Win with Vivi during the Festival of the Hunt.
Win 10 Tetra Master matches.(Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Use the Steal command 50 times.
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.
Win 10 items at the Treno Auction House.
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 a miniature copy of the Prima Vista.
Receive 10 rewards from Queen Stella.
Obtain the Hammer.
Receive certification as a Rank S Treasure Hunter.
Complete FINAL FANTASY IX.
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).
Enter trance 50 times.
Activate the Rebirth Flame ability when all party members are incapacitated.
Summon the eidolon Ark.
View 79 Active Time Events.
Obtain 4 moonstones.
Obtain the Tower.
Obtain the Mace of Zeus.
Obtain the Gastro Fork.
Obtain Excalibur II.
Guide all the residents of Cleyra to safety.