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.
Correctly answer all the questions in Ragtime Mouse's pop quiz.
Gain the favor of all friendly enemies.
Uncover the secret of the Eidolon Wall.
Form a party with Quina Quen and three female characters.
Play the blackjack minigame.
Attain level 99 with at least one character.
Activate the Rebirth Flame ability when all party members are incapacitated.
Have a single character affected by all status ailments. (both beneficial and detrimental).
Win 100 Tetra Master matches. (Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Obtain the Gastro Fork.
Successfully catch 99 frogs.
Summon the eidolon Madeen.
Summon the eidolon Phoenix.
Cause Moguo to have a tantrum.
Visit every beach in Gaia.
Acquire all available support abilities.
Repair the machine at Mognet Central.
Obtain a bottle of Superslick.
Win 10 Tetra Master matches.(Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Defeat Ozma.
Receive certification as a Rank S Treasure Hunter.
Purchase all items available from Stiltzkin.
Obtain 4 moonstones.
Complete FINAL FANTASY IX.
Obtain Excalibur II.
Defeat Lich, the Guardian of Earth.
Obtain the Mace of Zeus.
Defeat Kraken, the Guardian of Water.
Summon the eidolon Ark.
Defeat Tiamat, the Guardian of Wind.
Obtain the Rune Claws.
Obtain the Angel Flute.
Defeat Maliris, the Guardian of Fire.
Summon Eidolons 50 times.
Obtain the Tower.
Defeat 10000 enemies.
Obtain Kain's Lance.
Obtain the sacred blade Excalibur.
Obtain the complete set of Genji armor.
Obtain the Tiger Racket.
Obtain the Ultima Weapon.
Locate all hidden treasures on the world map.
Raise your chocobo's beak level to 99.
Obtain the Whale Whisker.
Obtain the Hammer.
Defeat Behemoth in the Treno weapon shop using Dagger.
Use Blue Magic spells 100 times.
View 79 Active Time Events.
Summon the eidolon Bahamut.
Use White Magic spells 200 times.
Summon the eidolon Fenrir.
Summon the eidolon Atomos.
Summon the eidolon Carbuncle.
Receive 10 rewards from Queen Stella.
Win 10 items at the Treno Auction House.
Obtain an airship.
Summon the eidolon Odin.
Summon the eidolon Leviathan.
Summon the eidolon Ramuh.
Summon the eidolon Ifrit.
Summon the eidolon Shiva.
Form a party with four male characters.
Win a Tetra Master match.
Obtain a miniature copy of the Prima Vista.
Beat the Nero Brothers' shuffling game nine times in a row.
Obtain Athlete Queen.
Synthesize 30 items.
Use Black Magic spells 100 times.
Successfully catch a golden frog.
Obtain Madain's Ring via mining.
Free Kuppo from a wall in Fossil Roo.
Receive 30 back attacks.
Defeat 1000 enemies.
Guide all the residents of Cleyra to safety.
Synthesize 10 items.
Enter trance 50 times.
Use the Defend command 50 times.
Win with Vivi during the Festival of the Hunt.
Receive a Very Good Omen from a color fortune.
Defeat 100 enemies.
Use the Steal command 50 times.
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.