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