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.
Defeat 10000 enemies.
Complete FINAL FANTASY IX.
Summon the eidolon Ark.
Win 100 Tetra Master matches. (Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Uncover the secret of the Eidolon Wall.
Repair the machine at Mognet Central.
Obtain a bottle of Superslick.
Defeat Ozma.
Visit every beach in Gaia.
Raise your chocobo's beak level to 99.
Acquire all available support abilities.
Obtain the Ultima Weapon.
Obtain the Tiger Racket.
Locate all hidden treasures on the world map.
Obtain the Whale Whisker.
Obtain the Gastro Fork.
Successfully catch 99 frogs.
Have a single character affected by all status ailments. (both beneficial and detrimental).
Receive 30 back attacks.
Defeat 1000 enemies.
Correctly answer all the questions in Ragtime Mouse's pop quiz.
Summon the eidolon Madeen.
Activate the Rebirth Flame ability when all party members are incapacitated.
Gain the favor of all friendly enemies.
Obtain 4 moonstones.
Summon the eidolon Bahamut.
Summon the eidolon Odin.
Obtain the sacred blade Excalibur.
Obtain the Hammer.
Receive certification as a Rank S Treasure Hunter.
Defeat Behemoth in the Treno weapon shop using Dagger.
Receive 10 rewards from Queen Stella.
Purchase all items available from Stiltzkin.
Obtain Excalibur II.
Form a party with Quina Quen and three female characters.
Form a party with four male characters.
Defeat Lich, the Guardian of Earth.
Obtain the complete set of Genji armor.
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.
Summon the eidolon Phoenix.
Obtain the Tower.
Summon the eidolon Carbuncle.
Obtain Kain's Lance.
View 79 Active Time Events.
Enter trance 50 times.
Obtain an airship.
Use Blue Magic spells 100 times.
Summon Eidolons 50 times.
Summon the eidolon Ifrit.
Use White Magic spells 200 times.
Summon the eidolon Shiva.
Summon the eidolon Leviathan.
Summon the eidolon Atomos.
Synthesize 30 items.
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 Fenrir.
Summon the eidolon Ramuh.
Win 10 Tetra Master matches.(Certain NPCs can be re-challenged to increase your win count after progressing through the game.)
Obtain Madain's Ring via mining.
Free Kuppo from a wall in Fossil Roo.
Use Black Magic spells 100 times.
Attain level 99 with at least one character.
Guide all the residents of Cleyra to safety.
Synthesize 10 items.
Use the Steal command 50 times.
Successfully catch a golden frog.
Win with Vivi during the Festival of the Hunt.
Receive a Very Good Omen from a color fortune.
Defeat 100 enemies.
Use the Defend command 50 times.
Cause Moguo to have a tantrum.
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.