From the introduction:
POWER KILL is a roleplaying metagame. It is not a game unto itself--it is instead a layer of "game" that you add to whatever Normal Roleplaying Game (NRG) you are currently playing. POWER KILL has no particular rules system unto itself; just use the regular rules of the NRG you're playing as normal. POWER KILL only comes into play at the beginning and ending of each Regular Game Session (RGS)....
The intent of POWER KILL is to add an additional level of Fun And Excitement (FAE) to your NRG sessions. You'll play your NRG as always, but the addition of POWER KILL mini-sessions at the beginning and ending of your normal session will add a lot to your gaming experience.