Get 15 kills with an assualt rifle that has a silencer equipped.
get like 30 60 kills with the gun you want the heartbeat with
Heartbeat Sensor is not a Gun, it's a Attachment for all Assult Rifles. It is unlocked by killing 15 people with the silencer.
Modern warfare reflex and modern warfare are the same. Modern warfare "reflex" means that its for wii. If its just modern warfare its for the other consoles
itdepends on the map but i think heartbeat sensor is awesome but some people get ninja perk so they cant be seen by it
the wa2000 thermal scope and heartbeat sensor with a raffica red dot sight fmj
Modern warfare 2
modern warfare 2 is better .
modern warfare 2
Call of Duty Modern Warfare 2
Yes.
Modern Warfare 2
Modern warfare 1 or 2?