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