2 points/level You are incredibly difficult to kill. Each level of hard to kill gives +1 to HT rolls made for survival at -HP or below, and on any HT roll where failure means instant death (due to heart failure, poison, etc.). If this bonus makes the difference between cuccess and failure, you collapse, apparently dead (or disabled), but come to in the usual amount of time - see Recovering from Unconsciousness. A successful Diagnosis roll (or a mechanic roll, for machines) reveals the truth.