Great game, but I feel some weapons are in the wrong classes. The melee weapons belong in the sniper's secondary, and the pistols need to be upgraded. They're overall useless. It's a 3/5 for me hope this helps. :)
Beat Nerdook's Family: Fully upgrade Gunner, Bouncer and Zombie, Zombie makes a good reinforcement, Gunner is strong and the Bouncer's tank like defense compliments the Gunner's low HP + to keep alive!
maybe he gave them the last chance for sequel ;)