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