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