Score 50k in survival mode
Achieve a x20 multiplier
Finish the story
Defeat a boss with just the pistol
Eliminate the threat in the laboratory
Bring the lighthouse back to life
Upgrade all weapons to Max level
Acquire all weapons in story mode
Help the refugees at the factory
Find $5,000
Survive the ambush at the schoolyard
Find all parts of the golden gun
Survive the subway journey
Shred 100 monsters with the harvester
Destroy 2,000 environment objects
Survive the electric chase
Dissolve 5 zombies in acid
Solve the village's insect problem
Obtain automatic guards for the village
Survive the worm invasion
Blow up 7 enemies with a single explosion
Achieve a x10 multiplier
Defeat the cellar inhabitant.
Allow the looter to live.
Reach the end of the first level.
Kill 50 enemies without getting hurt
Prevent the looter from obtaining a weapon
Help all 6 park defenders to survive
Finish the story on "maniac" difficulty
Defeat a boss without getting hurt
Score 100k in survival mode
Score 250k in survival mode
Find all pieces of the flak jacket