I've just gotten this game recently, the Gold Edition Dark Avatar version.
Anyways I've played some games and I notice that I can't use any of the Mass Drivers past Nano Ripper.
Now it didn't matter much in the first couple games, but now I'm on suicidal and I have neutrino bullets and I kind of need to be able to install them to have a good chance of beating the game.
I've tried restarting the game, and I even tried updating it, no luck. I have version 1.5 at the bottom left of the main menu.
Can anyone tell me whats wrong?