In single player, you have to pick one up from a dead enemy, or have one (in the cold weather missions).
In Multi-Player you cannot have one on a Sub-Machine gun or on your sidearm.
In order to earn your heartbeat sensor, you have to get fifteen kills with a silencer attached to the weapon.
If you want to know the challenge requirements for any weapon attachment, just highlight that attachment, and press (square) on the PS3.
You play it.
A heart beat counter circuit typically consists of a heart rate sensor connected to a microcontroller (such as Arduino) which processes the sensor data and displays the heart rate on a digital display (such as an LCD screen). The heart rate sensor measures the electrical activity of the heart and converts it into a signal that the microcontroller can interpret. The microcontroller then calculates the heart rate based on the sensor data and displays it on the screen.
You can't
u dont
you kill him alot without letting him kill you
At the museum... that place is unlocked when you beat the game.
only if you have a perk called bling. It lets u have 2 attachments on your secondary or primary gun
Finish Campaign Finish Online ( 10 prestige )
U go to multiplayer if no multiplayer u beat
you have to shoot it with the light machine gun you have
no it does not have gore i played the game and beat it there is not any gore!!!!
4 hours, 37 minuts, 23 seconds