Speed Hack

If you want to use speed hack, use speed from 3 - 5. If you want to kill a mutant using knife, shovel or any melee weapon, first find a mutant who doesn't move ( there will always be 1 ) Knife it's head and go back knife go back and knife (repeat. If you don't the mutant will kill you sometimes cuz some mutants fake it.) and Get your Kill!

I dont get it.