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