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