Hints & Tips

Remaining alive
In no way stay still, even if you are trying to shoot someone or something. If you move around, it will be harder for the Tan army to hit you. The same goes for the Bosses. If you miss an enemy, turn around and come back for another try, but do not remain still. For heavy populated areas, go forward but weave left and right as you do so. This will help keep you alive until you reach the next health bag.

Sink the Shark Submarine
You have to sink the Shark Submarine at the end of level 2. First, kill all the tan soldiers that appear. Then hold L1 and press the Right Analog-stick to aim for the gun turrets on top of the submarine. Now destroy the turrets to sink it.

Weapons
Try to obtain the Bazooka and the Flamethrower's power to maximum. Then use the Bazooka as your main weapon. It can blow up obstacles as well as cause plenty of heavy damage. If you find yourself unable to kill an enemy close to you, you can quickly change to the Flamethrower and melt them, then change back to the Bazooka.