FUTURE COP LAPD  

On the 4th level (Venice beach) when you get to the 
beach and the woman voice over says CROWD CONTROL SITUATION
Kill the men and head to the north west as far as you can go here 
you'll find a power up. But this is no ordinary power up its a 
Dog Missiles (or something like that) then on the next level choose 
it as a weapon . Its fire explosive dogs tha kill anything in site

To access all of the first 8 levels enter the word FUMUGYBLLL as a password