You have to be a support or anti-armor when your kit is done loading face the sky and drop your ammo box it will 2X its normal hold it even can fill it up try it.
these ways help you kill enemys more easier but remember this game can get more harder!!
1. always get guns that shoot faster
2. go more near the enemys althouugh they can get you, you just shoot
3. always crouch under the grass to get good protection
4. some people gets mixed up on there tank parts so i tell you dont press R1 and R2 together press the RIGHT ANOLOG
You can hold your breath to steady your aiming (and thus hit on target), this is most useful during multiplayer matches when you are using a Sniper Rifle. You can hold your breath by pressing the L3 button.
NOTE: This will only last a few seconds (before you have to breath in/out again).
Easy on survival,just go to the barrels by the gun symbol where you buy new guns,take a run up and jump just before the barrels,and stay on the roof of the cabin,you will now be never defeated.
Bonus interviews - Just beat the game once to unlock Bonus Interviews.
At the Chapter Select menu hold select and press the following.
Right, Right, Left, Left, Square, Square.