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