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