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