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