"get the hardcore" whats is the hardcore.?

Question

in the call of duty 4, it says get hardcore. hardcore removes your hud and make your weapons even more deadly. i don't where to get hardcore and what is the hardcore i kind a get that but i am not sure what it is. so please tell me what is the hardcore and how to get hardcore. and how to removes hud please help me out here i can't find out i am confused when that thing came to my screen. so please help me help me help mehere

Answer 1

hardcore means it disable hud and the weapons are much more effective