Spondyl

Wyrmslayer Defeated Fafnir.

Scavenger Pick up 10,000 rounds for the STA-52 LAR rifle

This is Great for Spring Cleaning Use both Knockback & Precision functions of the P.E.P.S. Arm Cannon at least once.

Morbid Curiosity Complete Campaign Mode On 'Morbid'

Hero Clear all missions (including Side Ops and Extra Ops) with a S-rank

Key To The City You completed GTA IV to 100%.

Safari Hunter - Kill each enemy infantry type with a melee attack Kill one of each enemy infantry type with a melee attack

Woven Memories Clear Castle Oblivion 5F.

The Golden Rookery Find the missing Gold Penguin and return him back to his colony.

The Once and Final King You defeated the Shadowlord within four minutes and twenty seconds.

Fowl Five Piece Get a chain of 5 chickens strung together in Dead Ops Arcade.

Break a Leg! Defeat the "Old Friend" (Boss at the end of "Taking Control").

Lost Tears Saved the Lost Children. (Finished Episode 6)

Kill screen Get to the end.

Very Dead Complete A Mission On 'Undead'

Lingering Memories You viewed the second ending (Ending B).

Taking It For The Team You were on the winning team in all multiplayer team games.

Bullheaded Get 20 headshots with the M4 Semi-Automatic Pistol

Legends Grow Earn 5,000 Triumph points.

Rapid Reaction Force Complete Chapter 1 to 11 playing as Templar

Flyswatter Destroy all the floating turrets in Act 3-4.

Speedy Rexecutioner Destroy the Metal Gear REX boss in under 2 mins 30 seconds

Puzzler Complete all Puzzles in Jiminy's Journal.

Musicfriends J.S. Joust - Start a game with the secret Sportsfriends music option

Adapt and Overcome Complete a Daily Challenge operation.

Warp zone Reactivate all 5 warp gates.

Two's Company Win a battlefields game with another player in split screen

Boxing-Day Test Super Pole Riders - Play Kalgoorlie on Boxing Day (December 26)

Field Agent - Collect all intel Collect all intel within the game

Back into the Fray Clear Part 1 of the story.

Creator Maker Create three cooperative levels and three versus levels

Reaper - Kill 1500 Helghast Kill 1500 Helghast soldiers

Nobody Hides From Me Finish a level above 90% hit efficiency

Ace Port Royal Ace Port Royal

Remembrance Play three different Echoes

One Mech of a Ride Hijack your first Mech.

Judge Magister Completed the 50th trial.

First Strike Stop the superpowers from launching the nukes.

I Should Buy A Boat Get the Rocket Boat, also known as "The Loochador".

City of Light Reach Paris Mastery Level 20.

A Night at the Movies Complete The Icon.

Colonel Complete all levels on the normal difficulty

Elementary Sorcerer Acquired 100 Offerings.

They Should Write a Book..Or Make a Movie Complete the Level Nijmegen Bridge

Straight Edge Destroy at least 20 bottles of Nom Juice in the Single Player Campaign

Invisible War Incapacitate a cloaked enemy while still remaining cloaked yourself.

Super Smasher Awarded for smashing 3000 objects.

Let No Joyful Voice be Heard Awaken the Kraken!

Explosive Consequences Kill 5 Helghast soldiers with 1 grenade using the attachment on the M82-G Assault Rifle

Pointless Execute at least 10 Headshots before you find the first DropKit