Right, I've been handed down this game from my older brother, who has moved away, and I've never really played adventure/shooting games like this. I've been doing some research, and one thing that has cropped up again and again is the difficulty of the gun battles. Now, I'm not really experienced with gun battles, sans GTA IV (Whose gun battles are relatively easy, you have so much health to burn) and this game employs a Call of Duty esque health system, where only a few bullets can down you.
Are the gun battles really that difficult? And is the game itself difficult?