If anyone still needs it, I did make a video on youtube that explains how to win the game. It's very simple and 7 out of 8 people agree with me. If you need help then you can watch the video at http://www.youtube.com/watch?v=nAzWE_wVCGU&feature=channel_video_title
me: YAY A RIFLE! TIME TO SHOW THOSE RAPTORS WHO'SE BOSS! *walks outside and sees a raptor* me: hey raptor, say hello to satan for me! *shoots gun at raptor* Raptor: RAWR! *shakes off bullet like nothing happened and eats me*
I have to wonder what goes on when your barricaide falls and your fellow survivors run away, but you kill the remaining zombies and you don't die. Like does your main character look at the other 4 survivors and says "I told you everything was going to be ok, pussies." or something like that. That's what I would say.
The game is fun overall but in my opinion the clumsy movement of the main character and the zombies causes some unnecessary slowdown, and the "back to menu" button is broken, along with when you get the lazer sight for the pistol he doesn't say anything. Overall 4/5 because I'm a pushover when it comes to zombie games :P