Buy every weapon off the walls in a single Zombies game.

Complete DNA Sequence 2.

Find a secure place to hide and re-enter the Animus.

You beat a friend at pool.

Defeat 20 enemies by shooting from the hip (without aiming with L1/R1)

Get the Snowman Skin

Collect 25% of the prize bubbles on the story levels

Heart 3 authors

Post a comment on a community level

Place 10 stickers or decorations in your pod

Get 10 critters on screen at once.

Escape the Polar Sea.

Kill eight enemies in eight seconds using the Darkstar Fission Tether with two or more teammates.