Avoiding or sneak attacking monsters
The flashlight is useful for monsters detecting from afar but it will make you noticeable If you keep it turned off you will be able to avoid monsters much easier You can also sneakattack them even from a very close distance
Extra Options
In order to unlock extra options under the Options menu simply beat the game once
RunWalk Makes Travis Run by default
More Blood Makes the creatures spray more blood when attacked
Noise Filter Allows ability to turn off screen Grain effect making the graphics sharper
Bloody Footprints Travis will leave a footprint of blood with every step he takes
Flashlight Filter Change the light of the flashlight to a smiley face soccer ball jackolantern or the mark of Samuel
Health and energy drinks
After you exit from the back door of the hospital wander around a little bit to discover the health and energy drinks as well as other disposable weapons a vase 2x4 and a spike over by the bakery
Invisible enemies
In the place where Lisa tells you to go you will eventually encounter a room with a circular object in the middle with three doors on the left top and right side of it In this room you might see invisible enemies wearing a mask of some sort Look for the mask It will always shine when you move your flashlight around
List
Enter this for the following costume
CodeEffectup up down down left right left right X OUnlock the Codebreaker costume