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