Kill 50 characters in 5 seconds.

Use the Upgrade Menu to acquire an Upgrade.

Create 10 multiplayer lobbies.

Finish the game in Easy Mode

Kill 30 enemies with the Dragon Sniper

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

Kill 30 enemies with the MP40

Find 25 treasures

Find 15 treasures

Find 10 treasures

Kill three enemies with one explosion

Kill five enemies in a row with headshots

Find five treasures