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