half dice in Hero System

[Rupert]

Originally Posted by whswhs

In 6/e, the STUN multiplier is 1/2 d6, not 1d6-1. So for 1d6 KA, the average BODY is 3.5 and the average STUN is 7, reduced to 5 by PD. Three successful hits will cause mortal injury (BODY reduced below 0) but not stun or loss of consciousness (cumulative STUN loss 15). On the average, of course. Even the highest rolls would be 6 BODY and 16 STUN for one attack (after PD).

I'm not sure of the intent behind that rules change, but it does seem to make mortal combat less likely to stun foes.

As I understand it, that was the reason - with a 1d6-1 multiplier killing attacks were just too good at stunning and KOing characters.