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