Assassin's Creed IV: Black Flag

Complete memory sequence 6.

Assassin's Creed IV: Black Flag

Swim a total of 1 nmi.

Assassin's Creed IV: Black Flag

Kill a guard ringing a bell.

Burnout Paradise

Make Your First online Rival

Burnout Paradise

Get your B Class License

Burnout Paradise

Repair your car at critical damage in a Road Rage event

Burnout Paradise

Set a Time Road Rule on Watt St

Halo 4

Complete any Campaign mission cooperatively on Heroic or harder.

Call of Duty: Black Ops II

Successfully assassinate SDC Chairman Tian Zhao.

Call of Duty: Black Ops II

Successfully escort the VIPs to safety.

NHL 10

Get an overall A rating in a match with your Be A Pro character

Call of Duty: Black Ops II

In Green Run, pacify at least 10 zombies with 1 EMP.

Call of Duty: Black Ops II

Prestige once in multiplayer Public Match.

Halo 4

Win 20 War Games matchmaking matches.

Halo 4

Save a Film Clip from the Theater.

Crackdown 2

Complete the final phase of Project Sunburst at Agency Tower, alone or with another Agent.

Crackdown 2

Detonate every Beacon in Unity Heights, alone or with another Agent.

Crackdown 2

Detonate every Beacon in Pacific City, alone or with another Agent.

Call of Duty: Modern Warfare 3

Finish a Juggernaut with a knife in Special Ops.

Call of Duty: Modern Warfare 3

Kill 2 enemy helicopters without getting hit in a Special Ops Survival game.

Call of Duty: Modern Warfare 3

Kill 20 enemies with the Chopper Gunner in a single run in "Return to Sender."

Call of Duty: Modern Warfare 3

Destroy 3 tanks with a single 105mm shot in "Iron Lady."

Call of Duty: Modern Warfare 3

Take down a chopper with an AC-130 smoke grenade in "Bag and Drag."

Portal 2

Save a turret from redemption

Portal 2

Take GLaDOS' escape advice

NHL 10

Get the first star in a match with your Be A Pro character

Kinect Sports

Score a point by heading or kicking the ball in open play in Volleyball

Call of Duty: Black Ops

Finish 5 Wager Matches "in the money."

Dance Central

Give your first 5-Star performance in Dance Battle mode.

Call of Duty: Modern Warfare 2

Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.

Crackdown 2

Locate and activate every Absorption Unit in Pacific City, alone or with another Agent.

Crackdown 2

Secure every Tactical Location in Pacific City for the Agency, alone or with another Agent.

Crackdown 2

Kill 25 Freaks with thrown objects or vehicles.

Crackdown 2

Use the minigun to amass 20 enemy kills in a 10-second period.

Crackdown 2

While driving a vehicle, kill 5 enemies in a single power slide.