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