Defeat 50 enemies with stealth attacks

Defeat 20 enemies with the Pistole

Find 60 treasures

Finish the game in Normal Mode

Kill 50 enemies with the M4

Kill 20 enemies with Mk-NDI grenades

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

Kill three enemies with one explosion

Kill 50 enemies with the SAS - 12

Kill 20 enemies melee-attacking from behind

Kill five enemies in a row with a single punch, after softening them up with gunfire

Find all 60 treasures

Finish the game in Easy Mode