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.
Defeat Lich, the Guardian of Earth.
Obtain the Mace of Zeus.
Defeat Kraken, the Guardian of Water.
Defeat Tiamat, the Guardian of Wind.
Summon the eidolon Ark.
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.
Obtain the Gastro Fork.
Successfully catch 99 frogs.
Obtain the complete set of Genji armor.
Use Blue Magic spells 100 times.
Obtain the Tiger Racket.
Uncover the secret of the Eidolon Wall.
Cause Moguo to have a tantrum.
Repair the machine at Mognet Central.
Obtain a bottle of Superslick.
Win 10 items at the Treno Auction House.
Acquire all available support abilities.
Defeat Ozma.
Summon Eidolons 50 times.
Enter trance 50 times.
Attain level 99 with at least one character.
Activate the Rebirth Flame ability when all party members are incapacitated.
Summon the eidolon Phoenix.
Summon the eidolon Bahamut.
Summon the eidolon Madeen.
Gain the favor of all friendly enemies.
Locate all hidden treasures on the world map.
Receive a Very Good Omen from a color fortune.
Purchase all items available from Stiltzkin.
Synthesize 30 items.
Obtain the Ultima Weapon.
Obtain the Whale Whisker.
Jump rope 1000 times without tripping and obtain King of Jump Rope.
Jump rope 100 times without tripping.
Obtain the Hammer.
Defeat Behemoth in the Treno weapon shop using Dagger.
Receive 10 rewards from Queen Stella.
Use White Magic spells 200 times.
Summon the eidolon Odin.
Summon the eidolon Ifrit.
Summon the eidolon Shiva.
Obtain an airship.
Summon the eidolon Leviathan.
Summon the eidolon Atomos.
Obtain Athlete Queen.
Summon the eidolon Fenrir.
Summon the eidolon Carbuncle.
Summon the eidolon Ramuh.
Free Kuppo from a wall in Fossil Roo.
Successfully catch a golden frog.
Synthesize 10 items.
Use Black Magic spells 100 times.
Use the Defend command 50 times.
Use the Steal command 50 times.
Defeat 100 enemies.
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.
Defeat 1000 enemies.
Defeat 10000 enemies.
Raise your chocobo's beak level to 99.
Visit every beach in Gaia.
Obtain the sacred blade Excalibur.
Correctly answer all the questions in Ragtime Mouse's pop quiz.
Obtain a miniature copy of the Prima Vista.
Receive certification as a Rank S Treasure Hunter.
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.)
Receive 30 back attacks.
Have a single character affected by all status ailments. (both beneficial and detrimental).
View 79 Active Time Events.
Obtain 4 moonstones.
Obtain Excalibur II.
Guide all the residents of Cleyra to safety.