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