Find the Peng treasure

Upgrade your RIG and Stasis completely

Complete the game on the hardest difficulty setting

Relieve a Blaze of its rod.

Kill 6 enemies in a row with a shotgun - all of them as one shot kills.

Complete 'The Details' on any difficulty.

Complete 1 mission in Co-Op.

Get 5 headshots in a row using the same clip.

Kill 30 enemies with the Ripper

Kill 30 enemies with the Force Gun

Defeat the Moon.

Kill 30 Soldiers with head shots.

Save your Co-Op partner from an execution by killing the attacker.