For the gun addicted achievement just go into warm-up and do for some hours something else, if you did the kar k achievement you have it in the beast mode, so everything you shoot gets killed instantly (very handy for efficiency as well as offensive campaign).
@Godoodle Its not impossible, maybe your computer is too slow and you maybe have to close all the other applications and in the accuracy challenge you just need skill I can't help you there (I did it too and I could get all of the achievements).
@ tethers: They don't it's just a mechanism of the Program, that you don't see all of the towers shots, so it doesen't use up as much Ram for the graphic and the game caan run upon a normal speed.
I played savegame ultimate complete and i lost in the Boss World. Then I went back to my game and I had all the Ships ( also the tier5 ones ) available without the legendARY KEY. Awesome, THX Oozee
I hate this kreds stuff and the achievements are too hard if you don't purchase. Avhievements should be earned and not bought with crappy kreds. First i thought they're made to help the developers, but now every crap good game has got stuff in it like you have to purchse 20 krreds for this and that shit. Or get the full package and spare full 10 krds.