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