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.
Play the blackjack minigame.
Complete FINAL FANTASY IX.
Correctly answer all the questions in Ragtime Mouse's pop quiz.
Acquire all available support abilities.
Uncover the secret of the Eidolon Wall.
Defeat Ozma.
Defeat 10000 enemies.
Attain level 99 with at least one character.
Gain the favor of all friendly enemies.
Obtain 4 moonstones.
Summon the eidolon Ark.
Repair the machine at Mognet Central.
Obtain a bottle of Superslick.
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.
Have a single character affected by all status ailments. (both beneficial and detrimental).
Raise your chocobo's beak level to 99.
Obtain the Gastro Fork.
Successfully catch 99 frogs.
Obtain the sacred blade Excalibur.
Receive certification as a Rank S Treasure Hunter.
Defeat Behemoth in the Treno weapon shop using Dagger.
Obtain the Hammer.
Receive 10 rewards from Queen Stella.
Purchase all items available from Stiltzkin.
Obtain Excalibur II.
Defeat Lich, the Guardian of Earth.
Obtain the complete set of Genji armor.
Obtain the Mace of Zeus.
Defeat Kraken, the Guardian of Water.
Synthesize 30 items.
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.
View 79 Active Time Events.
Summon the eidolon Madeen.
Summon the eidolon Bahamut.
Obtain an airship.
Summon Eidolons 50 times.
Summon the eidolon Odin.
Summon the eidolon Leviathan.
Summon the eidolon Atomos.
Form a party with four male characters.
Obtain a miniature copy of the Prima Vista.
Win 100 Tetra Master matches. (Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Receive 30 back attacks.
Beat the Nero Brothers' shuffling game nine times in a row.
Obtain Athlete Queen.
Cause Moguo to have a tantrum.
Summon the eidolon Phoenix.
Summon the eidolon Carbuncle.
Summon the eidolon Fenrir.
Activate the Rebirth Flame ability when all party members are incapacitated.
Defeat 1000 enemies.
Obtain Madain's Ring via mining.
Free Kuppo from a wall in Fossil Roo.
Summon the eidolon Ramuh.
Synthesize 10 items.
Use White Magic spells 200 times.
Guide all the residents of Cleyra to safety.
Enter trance 50 times.
Summon the eidolon Ifrit.
Summon the eidolon Shiva.
Win 10 items at the Treno Auction House.
Use Blue Magic spells 100 times.
Use Black Magic spells 100 times.
Successfully catch a golden frog.
Win with Vivi during the Festival of the Hunt.
Win 10 Tetra Master matches.(Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Receive a Very Good Omen from a color fortune.
Defeat 100 enemies.
Enter Trance for the first time.
Use the Defend command 50 times.
Use the Steal command 50 times.
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.