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