Completed "Lair of the Metal Queen"

Completed "Welcome to the Age of Metal"

Defeat ten enemies in a row with a single punch, after softening them up with gunfire

Defeat 200 enemies with the GAU - 19

Finish the game in Crushing Mode

Defeat 30 enemies with the RPG - 7

Defeat 30 enemies with the Desert - 5

Defeat ten enemies with grenades by aiming while hanging

Find 60 treasures

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

Completed the "Braaaaaaaaaaaaains!" mission

Killed Ned...sort of

Completed the "House of the Ned" mission