I have to correct myself, it wasn't an RPG in Dead Nation, it was a grenade luncher >< I apologize, my mistake. But even though they are very powerful in Dead Nation, they have made the strong weapons have very very few bullets and such. I mean the blade canon thing, when fully upgraded (which can take some time), it can have 15 blades in total, of course you can find ammunition through the stages, but it's very random what kind of ammunition you get, and sometimes, you get ammunition to a weapon you haven't even bought yet (which is realistic enough). The grenade luncher can have....I think it was, 15 too, and the ammunition is the same thing really. Just had to correct that ><.
I actually agree with you Inkidu, on the fact that it's how they are used and how rare they are. But you can't blame the game companies for going the safe way with how they make the games, I mean, it's about making money, and if they have some statistics that say, that a zombie game, they way they have made it, is the most popular way of making a game, they're going to do that. I'm not saying I wouldn't like something different, because I would, just saying that I think that's what they are doing when they are making games like this.