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