Fun, but one gripe I have is the jumping. It seems like you jump the exact same height no matter if you just hit the key once or hold it down, which is annoying you're just trying to do something that only requires a tiny jump like getting over a small gap or onto a spring, and you have to put up with having your character just leaping way up into the air and slowly gliding back down.
Great game, but one thing I think could definitely make it better is the ability to switch weapons when you're in the middle of reloading. Because in real life, if I was in the middle of reloading but then suddenly saw some zombie with an axe about to kill one of my guys, I would just drop what I was doing and pull out my backup weapon, not go "Argh! I'm gonna see this through to the end!" and just continue to slowly reload.
I have to say, after Tucker decided to retreat in the final battle, I was thinking "wtf, I could have destroyed each of those tanks no." I took over EVERY structure on the map except for like two oil rigs, had the whole map covered with my guys, and had accumulated a huge amount of cash.
I really like the presentation of the story. But at the same time, the game feels kind of creepy. I don't know if that was the intention since the plots basically about a girl's guilty conscience, but at times the atmosphere almost feels like a survival horror. The first time the orange girl shows up catches you off guard too, and I at first thought she was going to be some creepy stalker antagonist or something.
I'm also curious as to just who the gray guy is supposed to be.
The whole "spot the differences" idea itself is fun but isn't wowing or anything. The area where this game truly stands out, obviously, is just the artwork. Really good stuff.
This game is very impressive visually. Great animation, especially on the zombie deaths. Half of what makes this game is just the atmosphere as you fend off hordes of zombies closing in on your barricade.
And to be quite honest, 500 headshots was pretty damn easy. Now I'm not one of those obsessively uber-hardcore gamers who do speed runs and no damage runs and FC Jordan on Guitar Hero II, but getting 500 headshots just wasn't that hard. As long as you just aim for the heads at all possible moments, you should get 500 no problem. I'd say it should be more like a medium challenge.