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Chapter III Complete Chapter III on any difficulty.

Chapter 4 Speedrun Complete a Speedrun of Chapter 4 below the target time.

You know you're REALLY Insane, right? Complete the entire main campaign on Authentic Plus difficulty

Big Game Trapper Use a hypno trap to turn a Rhino friendly in Mayday in Regular or Hardcore difficulty.

Give Them Something to Believe Complete New Game Plus

Lights Out Complete the "Light 'Em Up" Special Ops mission on Veteran difficulty.

Chapter 3 Speedrun Complete a Speedrun of Chapter 3 below the target time.

Undiscovered Truths Find all the intel hidden in Nightfall.

Eh...what's up, doc? In cooperative mode, revive wounded players 5 times.

Chimp on the Barbie In Ascension, kill a space monkey with a fire trap.

Burgertown Escort Service Rescue 1 survivor in Infection.

Come On And ... Slam 10 zombies at once in Outbreak.

Acquire Waffle Weapons! Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)

Green Series clear Get a silver medal on every green track

Deliver This Complete the "Special Delivery" Special Ops mission on Veteran difficulty.

He Talked Too Much Defeat Emerson Miller

You're Not Worthy As My Opponent Breach: Send 3 Challenges.

The third faction Rescue all the Buddies from their respective predicaments

Better than the Best Complete the entire campaign on Authentic Plus difficulty with no manual saves

Last Blood At the end of Guns of Stygia, kill all the enemies on the walkways before the explosions do

Flyswatter Destroy all helicopters in the "Vertigo" Special Ops mission.

Heavy Fire Kill a total of 30 enemies with Browning gun.

Chapter 6 Speedrun Complete a Speedrun of Chapter 6 below the target time.

Egg-stra Devastation! Complete the Egg-Stra XP challenge and then destroy a hive in the Devastation DLC package.

Dinner Date Pigsy's Perfect 10: Collect all hidden food and pin-up girls.

Act IV Complete Act IV.

Pinnacle Complete the "Vertigo" Special Ops mission on Veteran difficulty.

Spiritually Attuned Make 100 Psychic Links (Share or Steal)

Street Fighter Complete all Dragon's Teeth Assignments

Chapter IV Complete Chapter IV on any difficulty.

Alright, Alright Survive until round 10 in Infection.

Rookie Finish the game on Easy difficulty.

Deadhead Get 150 zombie headshots in a single game. (Map Pack 2 only)

Survivor Survive until Round 25 in Outbreak.

A Bridge To Somewhere Extend the bridge in Awakening in Regular or Hardcore difficulty.

Chapter 5 Speedrun Complete a Speedrun of Chapter 5 below the target time.

Nightwing Revenge Obtain 78 medals on the original Arkham City and Nightwing Bundle Pack ranked maps (as Nightwing)

Release the Kraken! Killed 20 enemies during the boat exfil in Rip Current

Up-Lifting On Monorail Factory, kill all enemies whilst riding the lift

Robin Revenge Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)

PC Load Letter Use the 3D printer 15 times in a single match in Outbreak.

To Jugger or to Jugger-Naut Kill all juggernauts after they land on Veteran difficulty in the "Vertigo" Special Ops mission.

The Ultimate Sacrifice In Zetsubou No Shima, retrieve the Skull of Nan Sapwe.

Golden Idol Perform every Single Player Skillshot in the game

Chapter 8 Speedrun Complete a Speedrun of Chapter 8 below the target time.

Untouchable Complete SAM'S STORY on Normal or higher difficulty without dying in Batwing encounters.

Call me Terror-Billy! Beat the game on "Call me Terror-Billy!" difficulty or higher

Footy Foul Kill 2 enemies with 1 Slide Kick during Slow-Mo

Chapter 7 Speedrun Complete a Speedrun of Chapter 7 below the target time.

Supernova Get 3 stars on each of the first 14 Echoes