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