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