Hunt the forest for all sorts of animals. There are secret objects what will get you bonus points as well as you can lose points by shooting the wrong things. Try to unlock different skin types by completing each levels.
Defend the hill against all mindless zombies that assumed it to be their home. Use 19 powerful weapons including the hand cannon, hunter pistol and the jackhammer to destroy them.
Strike down the enemies once again with a pistol or a sniper rifle. Don't forget to shoot the bomb within 2 seconds otherwise it'll explode and damage your health.
Save the rebel fortress from a never-ending onslaught of enemy troops, jeeps, tanks, artillery and helicopters. Shoot them all down before they destroy it.
Your base is under attack by enemy soldiers and your job is to defend it with everything you got! Can you hold down the enemies and defend the fort until the 19th day has passed?