I know I'm a bit behind but I would like to know is it worth my while hacking away at professional mode? I can't seem to get anywhere with it. Are there any areas that are not open in the other two modes. Thanks for your time.
I'm not sure about different area's but you unlock a lot more weapons upon completing it, such as a laser cannon.
Theres also the feeling that you beat a game on its hardest level
I maxed it out but the thing is if they are right on top of you its tricky because they move faster than zombies. I use it where its needed. Like in the hall with the water, where Ashley has to lower the two bridges. They are the only two guns I carry with me all the time. I have at least 22million pasatetas( I think thats how u spell it) so money is no problem except when going into proffesional. As they say you can't take it with you.
I do so love this game.