ive beaten it twice. The first time i became a super heavy, and the second time i became a ghost sniper. The heavys 2 level is better than the ghost sniper
this wont work for impossible, but i just get a few guys, get the third guy, then buy a turret, and pretty soon im to the next age where i repeat the process. Except for the space age you should make a few guys, get the first turret, make a few more guys, make some tanks. then get the red turret. then just keep doing that until you have 4 blue turrets. then just save up 300,000 gold, and buy 2 super soldiers, and there you go.
The only way i know to win, is to save up cash and buy the rocket boots. So i can then get to the hidden level and get tons of cash, but I can't beat the hidden level, unless i get a shotgun.
 "Bomb-a-bomb"){kind=icon}
 "Reys Quest To Get Some Pringles!!"){kind=icon}
 "Stick Steve and the Odd Arrows Part 1"){kind=icon}
 "Bubble Tanks 2"){kind=icon}
 "Ragdoll Course"){kind=icon}
 "Escape #1: The Car"){kind=icon}
 "Territory WAR Online"){kind=icon}
 "Protector: Reclaiming the Throne"){kind=icon}
 "super mafia brothers"){kind=icon}
 "Art Of War"){kind=icon}
 "Age of War"){kind=icon}
 "Endless War 3"){kind=icon}
 "Kongai Launch"){kind=icon}
 "Pandemic 2"){kind=icon}
 "LRU 3: Darkness Reborn"){kind=icon}