To beat impossible don't evolve until you can get a double turret. Spam club men like crazy and use your special whenever possible. try to get at least 3 egg shooters early on but don't bother with a 4th. After you get the double turret send out men when needed and try to get more turrets once you get 4 double turrets evolve and try to get 4 super turrets. Save up money for a lot of super soldiers and attack the enemy base
I like the acheivements, but theres one ill never be able to get. I never have less then 1% of my hp because i have 22k hp and im level 317 so I level too fast for my hp to ever get that low :(
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