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