You can if you pimp your save a bit. Bonus points to changing the stats of an item in the games resource folder and it won't register as cheating in the game. The only problem is that other characters can also get most items unless you want to pimp out a unique weapon you like. I've been riding solo on hardcore dark difficulty not problems so far.Can you actually fight and win solo? It feel like this game is tuned for the allies. But I fucking hate all of them.
The downside is that if you mess with saves too much they might become corrupt and not work anymore which happened to me with update 4.36. Still works fine with 4.35 but not newer and I'm not enough of a coder to find where the problem is and fix it so I had to restart. Fair warning to you there, but it does make the game a whole lot easier if you just want to experience the story and maybe feel a little bit like a badass.