Complete a level with more than one player

Choose a costume for your sackperson with at least one item on your head, at least one item on your body, and a material

Complete one Cooperative Multiplayer game

Find one treasure

Finish the game in Normal Mode

Find all 60 treasures

Kill 30 enemies with the Dragon Sniper

Kill 30 enemies with the MP40

Kill 50 enemies with the SAS - 12

Find 50 treasures

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

Kill 20 enemies with the Desert - 5

Find 35 treasures