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