huh, guess I beat the game now.
after overloading all previous cores (namely the increased monster spawn, double health, monster slow down and the minigun) depsite beaten it twice now, no core spawns anymore.so guess I likely already have them all, ntohing to do here anymore :-)
I would lvoe to but I honestly paid zero atention.
Like at some point I started the next, got myself 1 or 2 turrets. and then jsut let it run idly in the backgorund for an hour or so while I was doing other stuff.
so I could come back, have a ton of points and would spent it on as many upgrades as possible.,
risne and repeat.
so i didnt really play it actively after a certain points.
couldnt really give you any time estimate therefor