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