Here is the full list of all 58 Marvel: Ultimate Alliance achievements.
Unlocked ALL outfits for EVERY hero
Dr. Doom was utterly defeated.
Nick Fury was unlocked as a playable hero.
Doom has spoken with himself.
Unlocked all the outfits for Doom.
Unlocked all the outfits for Magneto.
Unlocked all the outfits for Venom.
Unlocked all the outfits for Cyclops.
Unlocked all the outfits for Sabretooth.
Unlocked all the outfits for Nightcrawler.
Silver Surfer was unlocked as a playable hero.
Attained gold on all comic missions.
The Mighty Galactus was toppled
Titannus was defeated.
Completed Skrull Cityscape level without defeating a single enemy.
Defeated 4000 enemies.
Deathbird was crushed.
Gladiator was defeated.
Sabretooth has been mistaken for Wolverine
Loki was defeated.
Ymir fell to the forces of good.
Executioner and Enchantress were defeated.
Unlocked all the outfits for Hawkeye.
Unlocked all the outfits for the Hulk.
Answered 150 Trivia questions correctly.
Mephisto was struck down.
Blackheart was defeated.
Threw 500 enemies off a ledge.
Threw 50 Enemies off a ledge.
Magneto has spoken to Xavier.
Black Panther was unlocked as a playable hero.
Arcade was Defeated.
Cyclops has spoken with Jean.
Daredevil was unlocked as a playable hero.
The evil Mandarin was crushed by the forces of good.
Grey Gargoyle was defeated.
The Mighty Kraken was defeated.
Tigershark and Attuma were defeated.
M.O.D.O.K was defeated.
Performed 200 Finishing Moves.
Threw 5 Enemies off a Ledge.
Fin Fang Foom was defeated.
Answered 15 Trivia questions correctly.
Answered 20 Trivia Questions Correctly In A Row.
Defeated 100 Enemies.
Performed 50 Finishing Moves.
Performed 5 Finishing Moves.
Defeated 10 Enemies.
Completed a level with at least 1 other player
Completed 25 levels with at least 1 other player.
Beat Marvel: Ultimate Alliance in Hard Mode.
Won 1 Arcade Mode Level.
Won 20 Arcade Mode Levels.
Won 15 Arcade Mode levels consecutively.
Win 3 Arcade levels consecutively.
Won 100 Arcade Mode Levels.
Completed 1 level with 3 other players.
Completed 25 levels with 3 other players.