CosmoYurri

Oh, My Bad Kill your friends 1000 times.

Fresh Moves Get a Kill while airborne from a wallhop

I Believe I Can Glide Glide 800m continuously with the wingsuit in Co-Op Campaign or Endgame

Win Dark Forest 10 times Win Dark Forest 10 times
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Triple Trouble Try for a 3 chain combo!

Window Shopping Let the wind take you through

You Found Me! Discover and fight Hidden Kombatant 1 in Arcade Ladder

Preemptive Strike In Classified, kill 50 Nova 6 Crawlers without letting them explode in a single game

Kill 1500 Enemies Kill 1500 Enemies
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Drop The Bald Defeat Lex Luthor.

Cu later Complete "Copper World"

Fairy King Defeat the Fairy Boss

Wizard's Diploma Beat the five base Challenges on Normal difficulty.

Crawl for Help In Classified, while in last stand use a teleporter and then get revived in a single game

Bring Out The Big Guns Get 50 kills with siege weapons
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On A Roll Complete Fast Food without losing a ball

Ground Control In Moon, prevent each excavator from breaching the base in one game.

Valley Blue clear Complete all Blue Valley maps (Any medal)

Job Security Complete Sector 003 - Security Crackdown

Shutout Win a game of soccer without the opposition scoring in the soccer game mode

Archmage Kill 10,000 enemies.

Grim Reaper Defeated the Harvester on Hard or Nightmare difficulty ("The Golems of Amgarrak" downloadable content)

Blackout Historian In Blackout, unlock Reznov, Mason, Woods and Menendez

Win Coxwell 10 times Win Coxwell 10 times
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Get out of that one. Put an opponent in a snooker

Bada Boom Kill 50 aliens with explosive weapons.

This Damn Island In The Darkest Shore, explore the entire island.

Little Lost Girl In Origins, release Samantha.

Trick Shot Kill a bird during a winning duel.

That's One Big Dragon!! Summon Shenron for the first time

Pent-up-agon In Classified, complete 5 consecutive rounds without leaving the war room elevator in a single game

Enforced Freedom Kill 100 Zombies with explosions from Fire Works

SLEEPOVER Escape the Daycare.

Win Rudhelm Siege 10 times Win Rudhelm Siege 10 times
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No Leaks Make it through the NOVA 6 gas without dying on Rebirth Island.

Sacrificial Lamb Shoot at or be shot by an ally with a Pack-a-Punch crossbow and kill six zombies with the explosion.

Win Lionspire 10 times Win Lionspire 10 times
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Promising Buster Complete 5 levels with 3 stars

Taste of Victory Win your first gold spaceship.

Professor's Diploma Beat the five base Challenges on Hard difficulty.

Isaac's Heart Kill Isaac with The Lost

Senseless Axe of Violence In Blood of the Dead, kill 5 zombies with the Hell's Redeemer before it starts its return

The Struggle Over Self An alternate form of combat, with an alternate path to victory. Get 20 wins in Avatar Battles. But don't obsess over the results. Let experience be your guide.
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Learner Complete all the tutorials

It's your funeral Complete "Numbers," "Project Nova," and "Victor Charlie" on Veteran difficulty.

Sage's Diploma Beat the five base Challenges on Bananas difficulty.

The Mind Kill Satan with The Lost

Survival Of The Fittest Reach Round 30 on a Survival Map

Square peg in a round hole Attempt to use an improvised battery in "Copper World"

Money, Money Settle the dissention inside your inner circle.