Complete level 1 in solo mode.
Complete level 1 in co-op mode.
Complete the last level in Crazytrain difficulty.
Kill 20 enemies with a chihuahua on your leg in solo mode.
Kill the screaming enemy in all levels in solo mode.
Kill Kim Bong Sik, without getting hit by his projectiles.
Kill Teniu the Grave, dodging all the crates.
Kill Bloodshot avoiding all his melee attacks and slapping his face everytime you can.
Complete the last level in solo mode.
Find and shoot all the hidden objects in the game in solo mode.
Perform 3,000 headshots in solo mode.
Perform 200 nutshots in solo mode.
Get a 4 Star global ranking at the end of all levels in solo mode.
