Got my own... the hard part wasn't 90% of the stuff (not even the zombie clearout) but it was that thrice-damned trailblazing mission. The cyberspace one (thrice damned because there's three levels). I came really darn close on the escorts too, but unlike SR2 I actually found them easier than the trailblazing. Must be because I apparently can't drive a bike in a curving halfpipe without it going up the wall, ending up stuck, and having to back up or get turned around)
I applaud anyone who can get the third one consistently, that one stuck me the whole time.