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