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With Great Power Comes Great Responsibility Clear the Amazing Guardians scenario in Episode mode.

Tōkon Assemble! Successfully land Tōkon Assemble 10 times during battle. (Excluding Offline Versus and Training mode.)
10/10

Perfect Timing! Successfully land a Perfect Reflect during battle. (Excluding Offline Versus and Training mode.)

Welcome to the Danger Room Create a room in Room Match.

Best. Activity. Ever. Play an Activity within the Open Lobby.

Ranking Up Without Fear Finish a Ranked Match.

Let's Take It Easy Finish 10 Casual Matches.
10/10

To the Sky! Successfully land 10 Slam Launchers during battle. (Excluding Offline Versus and Training mode.)
10/10

To Me, My X-Men Clear the Unbreakable X-Men scenario in Episode mode.

Super Assemble! Successfully land Super Assemble 10 times during battle. (Excluding Offline Versus and Training mode.)
10/10

The Ultimates Successfully land 10 Ultimate Skills during battle. (Excluding Offline Versus and Training mode.)
10/10

Mashers Unite! Successfully land 100 Link Attacks during battle. (Excluding Offline Versus and Training mode.)
100/100

Crossover Event Successfully land Crossover 10 times during battle. (Excluding Offline Versus and Training mode.)
10/10

Roll the Tape! View any replay.

Wall Breaker Trigger 10 Breaks during battle. (Excluding Offline Versus and Training mode.)
10/10

Saw It Coming a Mile Away Perform 10 Assemble Counters during battle. (Excluding Offline Versus and Training mode.)
10/10

Sidekick! Perform 100 Assemble Assist attacks during battle. (Excluding Offline Versus and Training mode.)
100/100

Your Very Own Stamp of Approval Use a Sticker.

Everybody Needs a Hobby Customize your avatar.

Following in Their Footsteps Follow a player.

New World Enter the Online Lobby.

Avengers, Assemble! Clear the Fighting Avengers scenario in Episode mode.

Smash! Successfully land Assemble Smash 10 times during battle. (Excluding Offline Versus and Training mode.)
10/10

Super Human Precision Successfully land 10 Super Skills during battle. (Excluding Offline Versus and Training mode.)
10/10

It's Showtime Defeat the Promoter in the Episodes.

The Prelude to Battle Clear the Startup Battle.

Big View Visit the map

Big Walk Cross the drawbridge

All In Earn all available Trophies for Modern Warfare® 3.

Danger Zone Buy all items from the Survival Air Support Armory.

Arms Dealer Buy all items from the Survival Weapon Armory.

Snezhnaya: Continental Explorer (I) Light up the maps of Everfrozen Earth, Volkodlak Tundra, Flamefeather Valley, White Birch Snowgrave, and Fellfrost Peak in the Snezhnaya region.

Glacial Treasure Hunter (I) Open 65 chests in Everfrozen Earth, Volkodlak Tundra, Flamefeather Valley, White Birch Snowgrave, and Fellfrost Peak.

Flight Attendant Kill all 5 enemies during the zero-g sequence in "Turbulence."

This Is My Boomstick Kill 30 enemies with the XM25 in "Black Tuesday."

The Best of the Best Complete the campaign on Hardened or Veteran difficulty.

This is the End Complete "Scorched Earth", "Down the Rabbit Hole", and "Dust to Dust" on Veteran difficulty.

Scout Leader Collect 46 Intel Items.

Nein Kill 9 enemies with A-10 strafing runs in "Scorched Earth."

The Darkest Hour Complete "Eye of the Storm", "Blood Brothers", and "Stronghold" on Veteran difficulty.

City of Lights Complete "Bag and Drag" and "Iron Lady" on Veteran difficulty.

Ménage à Trois Destroy 3 tanks with a single 105mm shot in "Iron Lady."

Danger Close Take down a chopper with an AC-130 smoke grenade in "Bag and Drag."

Payback Complete "Mind the Gap", "Goalpost", and "Return to Sender" on Veteran difficulty.

Kill Box Kill 20 enemies with the Chopper Gunner in a single run in "Return to Sender."

Informant Collect 22 Intel Items.

Out of the Frying Pan... Complete "Persona Non Grata", "Turbulence", and "Back on the Grid" on Veteran difficulty.

For Whom the Shell Tolls Destroy all targets during the mortar sequence with only 4 shells in "Back on the Grid."

What Goes Up... Destroy all the choppers with only the UGV's grenade launcher in "Persona Non Grata."

Strike! Kill 5 enemies with a single grenade.