While I'm not the game developer, I am a developer and a PC with 6GB of RAM (no matter how good the video card is) is going to have trouble doing pretty much anything. The core OS (Windows 10 for example) + a browser will gobble up 6GB instantly so that means anything you run is going to continously swap out with the hard drive. My advice is to add more RAM to the computer. Also 6GB is a weird configuration as RAM chips normally come in sets of 4 or 8. These days 8 or 16GB of RAM is cheap (under $40) so I would suggest doing that first. Is there *any* game you can run with this PC?
"a PC with 6GB of RAM (no matter how good the video card is) is going to have trouble doing pretty much anything"
Not true at all. I have a PC with 4gb ddr2 and the game runs fine. Its probably the video card.
And also OS + a browser wont eat up 6Gb unless you have like lots of heavy webistes open in multiple tabs.