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