I've encountered an issue with Painkiller when playing on Nightmare difficulty; my electrodriver and rocket chaingun are missing. I'm able to use the weapons if I'm playing a level where the aforementioned weapons can be picked up but they don't carry on to the next levels. This is clearly evident for example when I start the Military Base level and I cannot select those weapons although you can pick up plenty of ammo for them throughout the level. This problem however isn't present when playing Insomnia or Trauma difficulty levels. (I haven't tested Daydream mode)

I was wondering if anyone else has encountered the same problem? I tried reinstalling and starting a fresh new save from start but the issue is persistent. Moreover I would be highly interested to know if anyone knows how to fix this problem.