Actually, if you people would actually read the stuff that pops up... Each new dimension has a little blurb under the evo upgrade thing. That has all the information you really need to know. It isn't that complicated. Quit blaming your ignorance on the creator.
I was thinking the same thing John. I played it for the first time not more than a month ago and beat it without a problem. Now I can barely pass Day 2.
For the badge: FN Scar, +250 max base hp, +100 max hp, extended magazines powerup. Make sure to reload at the beginning to get the extra ammo from the powerup. Personal safety is a secondary priority; protect the base.