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Two's Company, Four's a Party Complete any Adventure level with 4 players.

World Champion Become world champion in MotoGP™ in MotoGP™ Career mode

Worth Every Penny Acquire 1000 credits in one month.

Great Explorer Trigger a total of 50 route changer Power Plays.

Out Of Reach Get an online form of 25 or better.

Skirmish - Chapter XIV Finish the levels from Chapter XIV in Squire difficulty

Multiplicitous In Zombie Rush, get your score multiplier up to 100

ARCHIVIST Collect all documents

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

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

Heavy Ordinance Specialist Destroy 50 Aerial Scorestreaks with Launchers in Multiplayer

Off My Planet Recover the Hyperwave Beacon.

Super-sleuth With Snowy, find all the buried objects in "Tintin and Haddock" mode!

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

Cat's nine lives Gain 9 Extra Lives

High Wire Act Kill 10 enemies while using a zipline

In the Game Play a women's football match

Friends With Benefits Had relations higher than 90 with all factions in the Modern Era

World Beater Get an online form of 1.

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

Perkaholic Have 9 perks active at the same time in MWZ

Total Football Successfully convert a player to a new position in Career Mode.

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

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

Ducati love Win a race with a Team Ducati bike in MotoGP™ Career mode

Don't make me pull the trigger! Survive for 5 minutes in Demolition mode

Aviation ace Finish every level of the three types of PLANE challenges!

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

Yamaha love Win a race with a Movistar Yamaha MotoGP bike in MotoGP™ Career mode

Man No More Build a suit of powered armor.

Prince of the Screen Reach King of the Screen level 3

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

Harvester Of Sorrow Complete the game on Expert

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

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

Escaped Awakening Escape Awakening for the first time in Regular or Hardcore difficulty.

Crash Proof Use a flashback in the DiRT Tour after receiving terminal damage and then go on to win the race

High Score Score 800,000 points in one game -- with Game Settings set to Hardcore.

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

That's One Way to Do It... Destroy an airborne enemy helicopter with a Mortar Strike

Honda love Win a race with a Team Repsol Honda bike in MotoGP™ Career mode

Alpha Protocol Complete Operation Desert Spear.

Tumbler Perform an impressive Barrel Roll

That Party was Ace Ace every Adventure level in The Journey Home.

Pink Progress Breed 50 pigs

Mercy Kill 5 enemies while they are on fire in Chapter 3: Fire Sale

The Bereaved Unlock Wendy

Data Theft Hack 10 computers.

It's a Trap! Kill at least one zombie with three different traps in a single round. (Map Pack 2 only)

Egg-stra Awakening! Complete the Egg-Stra XP challenge and then scan an obelisk in the Invasion DLC package.