So played this game refusing to get dark knights until I had taken the world which had taken...forever but the second I get dark knights boom worlds down 2 days.
Last mission they dont prepare you for in the allies campaign I got through every other mission easy but then suddenly i was just thrown at an instoppable force.
Strategy if your going to get all endings do the cure zombies first then find the evil graveyard and close the portal then find the parliment building that way the first two make it so theres barely any zombies