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When the zombies get too close if you're attacking you'll automatically push them instead of whacking/stabbing them. Only way I know of so far, but someone else might be along later to inform us of other ways. :)
It's the update version.
There are two sides to it - they're an indie developer company that is building the entire source code from the ground up themselves, and they are quite ambitious with what they want to achieve with the game. It's going to take a long time for them to get the game working properly - especially since they are accounting for lower end PCs, and are restructuring the way the game works now. They've also said they can't release the game as-is right now because it would essentially be unplayable (like if you took the engine out of a car and tried to get someone to drive it).
That said, it does appear they're skipping alpha stage completely and going for a point in production where it'd be Beta... I'd suggest just checking on it once every other week and seeing what progress they've made. :) If you've funded anything on Kickstarter recently, you'll be expecting a couple of years of waiting time: just treat this the same. ;D
I don't know if you noticed yet, but he was down-voted into oblivion.
Is there a chance of getting an ETA for the next patch release within the next few weeks? :) I can't wait to start playing the RC3 and beating some zombies down in a more literal sense. B)
Try this link.