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