Finish the game in Hard Mode

Kill three enemies with one explosion

Kill 50 enemies in a row without dying

Finish the game in Easy Mode

Kill 50 enemies with the SAS - 12

Kill 50 enemies with the M4

Kill 30 enemies with the MP40

Kill 30 enemies with the Dragon Sniper

Kill 50 enemies with the 92FS - 9mm

Find 40 treasures

Kill 10 enemies with grenades by aiming while hanging from a ledge

Find 30 treasures

Kill 50 enemies with the Moss - 12