I go back and play earlier levels with my jacked up character because it's fun to mow down baddies when you are OP. Admit it - you love it too. I like getting the 2nd and 3rd objective on each level too. But wouldn't it be nice if there was something to show for it? Problem sovled. We now have zone badges, in two flavors. Silver for unlocking zones and gold for three starring the entire zone. Zut! And they appear in your profile, so you can show them off to the world.