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