Here is the full list of all 58 Marvel: Ultimate Alliance 2 achievements.
Unlock 23 alternate costumes.
Earn 20 high scores for each type of Fusion: Targeted, Guided, and Clearing.
Have 10 special conversations between characters with a history while in an HQ map.
Defeat all Act I missions on Legendary Difficulty.
Collect 30 Audio Logs.
Collect 125 Team Boosts.
Defeat 12 mission bosses on Super Heroic or Legendary Difficulty without revival or map reload.
Finish what you started.
Defeat all Act II and III missions as a Pro-Registration team.
Collect 10 Concept Art Bundles in HQ maps.
Free a country.
Collect 125 Dossiers.
Defeat 25 maps on Super Heroic or Legendary Difficulty without revival or map reload.
Complete "Escort Duty" without destroying any turrets.
Complete "Escort Duty" without disabling any floor hazards.
Complete all melee training goals listed on the Stats page.
Earn 12 Gold Medals from Simulator Missions.
Break and enter.
Repay a favour.
Ambush your opponents.
Defend a convoy.
Raid a hideout.
Complete all Power training goals on the Stats page.
Collect 50 Team Boosts.
Earn 8 Silver Medals from Simulator Missions.
Choose a side.
Defend your leaders.
Protect a city.
Correctly answer 15 Trivia questions.
Earn 4 Bronze Medals from Simulator Missions.
Defeat 75 foes in "Balance"
Complete "Insidious Alliance" with all four heroes alive.
Defeat 2 foes within 10 seconds in "Insidious Alliance."
Crash a castle.
You or other players on your team must destroy 250 health containers.
Perform all 5 recommended training Fusions in Latveria.
Topple a dictator.
Rescue a hideout.
Stop a convoy.
Fight back an ambush.
Defeat all Act II and III missions as an Anti-Registration team.
Defeat all Act II missions on Legendary Difficulty.
Defeat all Act III missions on Legendary Difficulty.
Complete a map in Co-Op.
Complete 8 maps in Co-Op.
Complete 24 maps in Co-Op.
Complete all optional mission objectives.
Perform 10 revivals.
Perform 10 Fusions with another player-controlled hero in a Co-Op game.
Perform all Fusions by combining every available pairing of 24 heroes.
Collect 200 Team Boosts.
Score 30 Trivia Fusions.
Earn all Trivia rewards.
Earn Mission Succeeded on a Simulator Mission in Co-Op and return to the Simulator menu.
Complete all combat mastery goals listed on the Stats page.
Progress through "Insidious Alliance without breaking any Health Containers"
Defeat "Overload" with the X-Men.
Throw all the proximity mines in "Balance".