No missable achievements (plus 58 unknown)
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Topple a dictator.
Crash a castle.
You or other players on your team must destroy 250 health containers.
Protect a city.
Defend your leaders.
Choose a side.
Repay a favour.
Rescue a hideout.
Break and enter.
Correctly answer 15 Trivia questions.
Collect 50 Team Boosts.
Perform 10 revivals.
Stop a convoy.
Free a country.
Perform all 5 recommended training Fusions in Latveria.
Fight back an ambush.
Finish what you started.
Complete a map in Co-Op.
Raid a hideout.
Complete all Power training goals on the Stats page.
Collect 10 Concept Art Bundles in HQ maps.
Defeat all Act II and III missions as an Anti-Registration team.
Defend a convoy.
Ambush your opponents.
Collect 125 Dossiers.
Earn 4 Bronze Medals from Simulator Missions.
Complete all melee training goals listed on the Stats page.
Defeat all Act II and III missions as a Pro-Registration team.
Perform 10 Fusions with another player-controlled hero in a Co-Op game.
Collect 30 Audio Logs.
Defeat 2 foes within 10 seconds in "Insidious Alliance."
Have 10 special conversations between characters with a history while in an HQ map.
Complete 8 maps in Co-Op.
Defeat all Act I missions on Legendary Difficulty.
Complete "Insidious Alliance" with all four heroes alive.
Earn 8 Silver Medals from Simulator Missions.
Unlock 23 alternate costumes.
Earn 20 high scores for each type of Fusion: Targeted, Guided, and Clearing.
Complete all optional mission objectives.
Collect 125 Team Boosts.
Defeat all Act II missions on Legendary Difficulty.
Earn Mission Succeeded on a Simulator Mission in Co-Op and return to the Simulator menu.
Complete 24 maps in Co-Op.
Defeat "Overload" with the X-Men.
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.
Defeat all Act III missions on Legendary Difficulty.
Score 30 Trivia Fusions.
Earn 12 Gold Medals from Simulator Missions.
Progress through "Insidious Alliance without breaking any Health Containers"
Defeat 75 foes in "Balance"
Collect 200 Team Boosts.
Complete "Escort Duty" without disabling any floor hazards.
Complete "Escort Duty" without destroying any turrets.
Throw all the proximity mines in "Balance".
Complete all combat mastery goals listed on the Stats page.
Perform all Fusions by combining every available pairing of 24 heroes.
Earn all Trivia rewards.