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