Hint: Extra ammunition:
Shoot the animals (eagles, pigs, etc.) during game play to collect more ammunition.

Hint: Using the Zapper:
To use the Zapper in the game, just shoot at the menu screen.

Hint: Grenades:
Do not use grenades around civilians. It will kill them and you will lose life.

Hint: Grenade two vehicles simultaneously:
Wait until a helicopter or gunship is near a tank. Use a grenade in between them and it will destroy both of them.