Doom Difficulty Pack

This is just a mod that functions as a new difficulty. All hostile mobs have been modified and many neutral and passive mobs are more dangerous. This is a major rage addon- if you aren't careful, you will die constantly. It does not add anything new, so there is no texture pack required, and your own texture pack will work just fine. There are also no experimental settings required, but you do need to set your world to hard difficulty. It's more fun if things are a surprise, but you can read below if you want to know how things are changed.