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