just a piece of advice, use the lead pipe in the zombie room. why waste ammo when you can just kill a ton of melee attacking zombies in a little bit more time?
hands down the best in the series and if you havent played those then do it NOW!!! but even if you havent then its still my favorite side scrolling shooter
for beginners i would say to get the beretta cx4 storm because the first 3 cities and the robbers will give u a lot of 9mm luger ammo which is put to good use in the cx4