2) Throw a glass bottle at their head.
3) Hit them twice before they can pull out their gun.
4) Hit them on the back of the head with your fist.
5) Sticky shockers and other special weapons.
Also: on the same level, when you get to the end and they say "its you or them" run forward up the ladder and onto the roof. when you get there roll the whole way to the end of the train and jump onto the rope.
2.When crouching, run as fast as you ca and press B to do a commando roll (it is a good idea to commando roll passed small spots of light with guards around to remain undetected).
3.while your pistol is drawn, press up, down or left trigger to use the laser on it (helpful for shooting guards in the back of the head) if you try to use it while two guards are talking the other guard will see it and attack you.
4.use the optic cable at all doors to make sure that u wont be detected.
Don't step no broken glass from lights that have been shot out or broken windows because guards can hear the crunching of the glass.
When using the SK20 when zoomed use the left trigger to hold your breath to keep a steady aim but it cant be held for long.
When in a foggy area use the thermal vision to see past the fog and be aware of enemies
When there is an auto turret there is usually a guard nearby, so disable the FFI on it and whistle to get him shot