Completed "Scientific Pursuits"

Find 35 treasures

Kill 20 enemies with a brutal combo

Kill 50 enemies with the Moss - 12

Finish the game in Easy Mode

Kill three enemies with one explosion

Kill 30 enemies with the MP40

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

Kill 50 enemies with the 92FS - 9mm

Find 20 treasures

Kill five enemies with a brutal combo

Find 15 treasures

Kill 50 enemies with the AK-47