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