Here is the full list of all 58 Marvel: Ultimate Alliance achievements.
Unlocked ALL outfits for EVERY hero
Silver Surfer was unlocked as a playable hero.
Attained gold on all comic missions.
Defeated 4000 enemies.
Unlocked all the outfits for Magneto.
Unlocked all the outfits for Doom.
Threw 500 enemies off a ledge.
Unlocked all the outfits for Venom.
Unlocked all the outfits for Sabretooth.
Cyclops has spoken with Jean.
Unlocked all the outfits for the Hulk.
Unlocked all the outfits for Hawkeye.
Unlocked all the outfits for Nightcrawler.
Unlocked all the outfits for Cyclops.
Beat Marvel: Ultimate Alliance in Hard Mode.
Doom has spoken with himself.
Sabretooth has been mistaken for Wolverine
Threw 50 Enemies off a ledge.
Magneto has spoken to Xavier.
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.
Threw 5 Enemies off a Ledge.
Deathbird was crushed.
Gladiator was defeated.
Loki was defeated.
Ymir fell to the forces of good.
Executioner and Enchantress were defeated.
Answered 150 Trivia questions correctly.
Mephisto was struck down.
Blackheart was defeated.
Daredevil was unlocked as a playable hero.
Black Panther was unlocked as a playable hero.
Arcade was Defeated.
Performed 200 Finishing Moves.
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 50 Finishing Moves.
M.O.D.O.K was defeated.
Defeated 100 Enemies.
Answered 20 Trivia Questions Correctly In A Row.
Answered 15 Trivia questions correctly.
Fin Fang Foom was defeated.
Performed 5 Finishing Moves.
Defeated 10 Enemies.
Completed a level with at least 1 other player
Completed 25 levels with at least 1 other player.
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.