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