What most people don't know is minecraft was not the first block building game, and minecraft wasn't popular for months and months in beta until they patched and made it better. This game is not even close to MC, and if you bring up Terraria you are a moron and should stick to playing TDP4.
To make lv 45 even easier, I made up a class called the "Zombie Sniper"
Railgun, Extended mags, stealth(40% avoidence), and health regen!, ability - nuke. This is really easy with high reload, and luck. The idea is to nuke large clusters with your ability and nuke drops, the railgun will pierce tons of zombies, and you can litterally stay in one spot to regen your hp long enough before moving again. No sweat at all on 45.
Those stuck on the final level of the Assorted player pack, at the ledge that you need to jump over the spikes, instead of leaping off, leap and jump off the black brick to catapult over the spike, after that its easy cake.
Excellent game idea using unity engine I have to say, but those attempting the hard badge, if you computer is super slow like my laptop is, forget about it lol.
I would of imagined newer guns would do more damage, like an Ak47 doing about the same as the uzi or ump? hunting rifle was the only good gun so far imho.