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