What's the point of having health upgrades if it doesn't increase your starting life? It's basically saying that you have to be good enough to NOT get hit in the first place so you can (hopefully) stock up on hearts from the chests.
For all of you complaining about your missing badge, you DO realize that there's a 'report a missing achievement' button in the lower right corner of that box.
Make it so that we at least earn upgrade points for the tanks we killed instead of giving us nothing when lose. We'd actually like to COMPLETE the game, thank you very much.
Air Strike effects:
-Big bomb with peace sign: High critical hit ratio
-Tri-missles: low damage, hits all foes
-Atom Bomb: High damage, low critical hit ratio, hits all foes.
When trying to get the "Knee Deep in Undead" badge, just buy the Minigun that costs 9000 exp, then put the rest towards health boosts for you and your base. Have fun.