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