I won in all ways possible. way #1: close portal at evil graveyard. Way #2: draft constitution at city hall. Way #3: cure zombeism at a lab. Way #4: gain every single plot of land.
I easily beat bugzilla with veteran, docter, tons of stun grenades, 1 adrenalin, 2 health packs, 2 bug repelants, and a sledgehammer. NO ALIEN GUN! it was easy, did it on my first try XD