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