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