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