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