Conserving ammunition
After every fire fight reload even if you have 22 rounds remaining If you keep doing this you should have enough ammunition for the long fire fights and levels
Garage Capturing Emilio Vargas
In order to capture Vargas you need to move quickly This will cause you to take some damage but to take out enemies quickly use the HE grenade launcher or the Red Phosphorus grenade launcher Use it on groups of enemies as you are chasing after him This works best on the two guards in the cafeteria style room if you have not caught him yet you can shoot the grenade off the wall and take both out without stopping
Gun guide
If you are going into a total building level such as the Crespo Foundation take along a shotgun or a submachine gun The reticule does not shrink as much when you move with an assault rifle You will move around a lot in buildings and room clearing For places like an oil refinery which has big indoor rooms and some outdoor areas take an assault rifle that is compact to carry a punch but is still semimaneuverable in rooms In industrial indoor settings take a sub that is good for big rooms and is still effective for small rooms In total building settings take along a shotgun Its targeting reticule barely shrinks when you move
Meat Packing Plant Finding hidden enemies
After you rescue the second hostage you have to go into a giant freezer Take out the guards on the catwalk then get into the crouching position Turn on your thermal imaging goggles There will be guards but they will be blacked out by mist and the carcasses of dead cows However with the goggles you can see their feet Shooting them in the feet or legs enough times will kill them saving you and your men from exposure
Penthouse Easier kills
Even though you are told quotno shootingquot in this level there is a surprise later where you have to shoot to first save someone then escape Because of this change your secondary weapon to either the Desert Eagle or SR2 This way you will not have to shoot someone four times to kill him with a weak silenced pistol
Voice Commands
Save the game when you diffuse a bomb save a hostage or do other
important goals so then when you or your team members get killed
you can go to load and every thing will be back the way it was and
you can be ready to waste the guy who got you