New Mystery Crates/Redo Old Crates

[Kamikaze Mongoose]

I looted a teleporter gun and a bunch of grenades this last round (incendiary, sarin, shock, I forget the last.) There's already some fun stuff, but it's watered down with the occasional medical supplies. We could remove the medical stuff and make the crates themselves harder to find and harder to open.

Edit: They don't have to be powerful items, either. Just finding standard vests would be nice.