Rounder101

Nom Nom Nom! Eat a captain with a Wretched Graug.

No Man Left Escape with all four players in Regular or Hardcore difficulty.

Super Sonic Rescue Completed your first SOS Mission.

Ride Shotgun Get 5 kills with a shotgun.
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Graceful Exit Don't get spotted in the Ep. 5: Gauntlet

Strength of the Pack Complete a Strike with a full fireteam consisting of only your clan members.

The Most Dangerous Game Defeat all the Beastmaster Warchiefs.

Archivalist Collect all journals

IT’S MESSING WITH MY HEAD, MAN!!! Beat a level in N. Verted mode

Machine Crusher Defeat NANCY-MI847J.

Amateur Bouncer Protected Sammy's from the Dixie Mafia

On the clock Beat the qualifier time on any Time Trial stretch

Blade of Death Killed 20 enemies using Throwing Knives

Drone Destruction Destroy 5 drones in Quick Match/Ranked Multiplayer.
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MOD Tinkerer Have every Gear MOD active for at least 1 minute each.

Giant Slayer Defeat El Gigante in Separate Ways.

Honor Bound Bind a piece of gear to a class.

Friendly Skies Defeated all waves in The OPS Zeal.

Cardboard Companions You found all of your cardboard buddies.

The Fourth Time Defeat Dr. Neo Cortex

Following Orders Complete all Secondary Objectives in the Main Campaign

Novice Beat the game on Novice difficulty or higher

Demolition Fan Satchel Charge 25 manned vehicles/pillboxes/pantherturms

Summercamp Play 1 multiplayer match as a counselor.

Master Samurai Parry an incoming projectile

Can't Stop This Win an Invasion 1v1 fight

Rexecutioner Destroy the Metal Gear REX boss

Ancient Blood Defeat Felicity D'Abano

Rip And Tear As Colt, inflict a truckload of damage to Eternalists during a single use of Havoc.

Completist - Destroy everything on the MAWLR Destroyed every destructible weapon on the MAWLR while on foot and on the Intruder

Tickets, Please! Use a Metro Station to Fast Travel.

Tower Master Complete 10 Living Towers

Greaser Get 5 kills with an SMG.
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Hot Flashes Catch a Ghûl Matron on fire during the Lord of the Hunt campaign.

Corpse Wagon Detonate fallen Leeches to kill 25 enemies

Ran out of fingers Find 11 hidden bags

Active Lifestyle Get a 3 Star Rating on all the Activities in the game

Vacuum Cleaner Decompress 20 Necromorphs without getting sucked out yourself

Old-Timer Acquire a car manufactured in 1959 or earlier.

Not kidding! Reach the podium in a total of 30 Quick Races (not unlockable in Split Screen mode).

Faction Champion Reach level 50 in any faction

Worldsoul Acquire all Vessel Fragments

Level Up! Level Up for the first time.

Campaign Bronze Obtain 36 medals on the original Arkham City campaigns (as Batman)

Ack Ack Protect your tanks by shooting down all planes in Operation Cobra.

Not a Scratch on Her! I'm not taking any chances, this bus can't take much more damage. (Ch. 12)

Metamorphosis Rescue all of the imprisoned grubs

A Most Singular Expert Master a single weapon

Battering Ram Shield Bash 5 different thugs

Liberty City (5) Your friends all like you above 90%.