What exactly do the ugrades improve? I know that some of them are obviose, but some are not; like the build things 20% faster ugrade.
Upgrades, when to choose what (http://knucklecracker.com/forums/index.php?topic=338.0)
Upgrades Hurt/Heal (http://knucklecracker.com/forums/index.php?topic=1095.0)
You beat me to it Karsten but there is one more Here (http://knucklecracker.com/forums/index.php?topic=603.0)
thanks :)