nope. thats the easiest way. i don't know wut difficulty your playing on, but if i rememeber correctly i had to kill 19 of them (this was on hard) or maybe it was 12? i can't remember now... anyway, just keep doin that ****! it took me a lil while also, but once i got in the mode i wooped ass so fast i didn't realise they were all dead untill the mo.....oops. anyway, just kick as good luck!