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