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