Recover the katana of clan Sakai.

Finish chapter "The Internet"

Break 100 crates

Kick a skateboard in to the face of an enemy

Finish chapter "District Null"

Kill enemy by ricocheting bullet off frying pan

Finish chapter "Old Town"

Get a 20x combo

Kill an enemy using a barrel

Complete "End of the Line".

Complete the "Saint Mark's Bistro" mission.

Sneak into the underground base without setting off the alarm above ground during "Black Project".

Complete "Yay Ka-Boom-Boom".