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