It's typical in game development to disable both exceptions and RTTI entirely. dynamic_cast is out on either of those counts. std::almost_everything is out due to exceptions.
I've posted that link once or twice before (once or twice literally, not sarcastically), it wouldn't surprise me if I was replying to you in one of those instances :)
EA released a GPL'd "EASTL" library a few years ago for those and other reasons, you can read all about it here: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n227...