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