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