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