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Reinforcement Develop 100 or more development items.

First Step into Darkness Complete the game on Casual difficulty.

Son of Medici Complete Story Mission: Son of Medici.

Big Boy You killed a tallboy using only your sword

Expensive Taste Used the Grinder to create a Legendary item.

Like Taking Candy from a Baby Finish the game on Very Easy difficulty or higher.

Hedge-hopper On the level FRONTLINE kill all of the enemy Red Army and Fascist Soldiers.

Saved Private Ryan Save the soldier before he burns to death.

Entry Level Electrician I should get this whole generator panel running just in case. (Ch. 14)

Friends and Foes Complete Rise and Fall on Hardened, Veteran, or Realistic.

A Hunt Begins Complete the third mission

Just take a bite Embrace Clay during your first meeting with him

The Bigger They Are Defeated the Invincible Empyrean Sentinel.

We shall fight on the beaches Complete Mission 2

Air Supremacy Killed 100 enemies with Wolf.

Tranquility Lane Completed "Tranquility Lane"

Digitize Me! Digitized into Claptrap's Brain.

Sound of thunder Unlock all Codex Entries in Through Mud and Blood

Impossible Trinity You completed the mission "Museum Piece".

Blogger Complete all 51 of Artyom's hidden Diary pages.

Cash For Crashes Earn 50 000 Credits.

Deadly Specialist Get a Specialist-based medal that requires 3 or more rapid kills while using any Specialist Weapon.

No stone left unturned Find 18 collectibles in the Campaign

Trashing Around Reach Player Rank 25.

Cut Your Teeth You were successfully promoted up a rank in multiplayer.

Heads Down In Multiplayer, fully suppress 5 enemies

Spider Sense Defeat Black Tiger.

Hating Them Tin Cans Wreck 100 Opponents.

Enlightened Find the truth.

Walk Free You successfully lost a 4 star wanted rating.

Weaponsmith Kill at least one enemy with each weapon available in the game

Platinum! Earn 10 Platinum Medals. Must be earned in 10 different battles.

Understanding Madness Complete Demon Within on Hardened, Veteran, or Realistic.

Frozen in Time Kill 50 Necromorphs while they are in Stasis (single player only)

Silverback In Black Hack the Data Vault and brace yourself for Cyber's Avengening in Dead Ops Arcade 2.

Patience is a virtue Experience all 3 endings in the Campaign

Scientific Pursuits Completed "Scientific Pursuits"

Challengers Champion Complete Challengers Championship.

Speed of Darkness You traveled 30 meters in less than 1 second

The whole story Finish the bonus chapter.

The Waters of Life Completed "The Waters of Life"

Between a rock and a hard place Beat Solomon, flawlessly, in The Great Destroyer

Razor Rain You killed 5 characters with Drop Assassination

Puzzle expert Finish all Mini-Games without skipping.

Voyeur Spy on people whenever possible, and finish.

Giantslayer - Kill the Heavy within 1 minute Kill the Blood Meridian heavy in under 1 minute

Backstabber Kiss Blake... then injure him, and finish.

Bloody Bar Brawl Sneak Kill an enemy after hitting them with a bottle.

Guardian Guardian Saved the Guardians from the Scav Poachers.

Berserker - Kill 25 Helghast with melee attacks Kill 25 Helghast using melee attacks