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