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