kalirion: Do you know the difference between Hard Drive gigs and Memory gigs? Unless your "Gaming Rig" is literally almost 20 years old (in which case it would be way too slow to run Stellaris), I guarantee you that it has more than 8 GB hard disk space.
Stellaris needs to 2GB memory (RAM). Your 8GB can handle it.
abbynormal52: Thanks, I'll show you the "About PC", I've got a 1 TB of hard drive, so I don't know the difference. I'm glad you're telling me like it is though. A PC is like a vehicle to me, I can drive them but I don't know what makes them go except my foot on the gas peddle;)
HP Pavilion Gaming Desktop Computer, AMD Ryzen 3 2200G, AMD Radeon RX 550, 8GB RAM, 1TB hard drive, Windows 10
Thats a good PC that you have. You should be able to play most games with no problems. With some of the newer 3D actions games, you might have to reduce the resolution and graphics settings, but most games will play just fine. This PC will run Stellaris without breaking a sweat. Just post on GOG if you need help adjusting resolution and graphics settings to get any future purchase to run smoothly. Welcome to the PC Master Race :)