ah worked it out, turrets have to be pretty much touching to trigger combos. nuke is a big favourite, but blackhole is the best idea, genius: 5/5 gaby, grosch!
damn stupid game... doesnt save my progress, then hyper defence is harder than high roller badge. i think the developer takes his game a lil too seriously, its really not a hard game
i really like this game, i think its good that the enemies go off screen, kinda like they're off your sensors or whatever. think it needs work though, i spotted building lasers/flak cos there were worthless after the main gun is fully upgraded. 4/5 though for effort, sequel or update would be awesome
i agree with xanth90, although i still think the last boss is too easy. anyways, its clearly says do the mission after hardmode clive, my badge appeared after 30 secs