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