Not the same user you replied to but I want to build a new PC pretty cheap that will be able to run both the new Fallout game and Dark Souls 3. If I wanted to replace my current rig with everything new (except keyboard/mouse/monitor/speakers) could I do it with a $300-400 budget? It doesn't need to run max settings but I want to give my current rig to someone else so I will need to replace most items.
sure you could do it, after a quick look on PC Part Picker, here is a build https://pcpartpicker.com/guide/kYNnTW/the-ultimate-console-killer by all means look at other build created by users on the website, or take some time and do some research to make your own build.
I'm not advocating this or saying that I have ever done this, but it's not difficult to get a windows OS torrent download and install it without any problems whatsoever. One has to be wary of viruses and whatnot of course. You're probably aware of this, but I thought I'd throw it out there.