A:Answer This is just the case, you will need to buy all of the actual processing and computing components to put inside of the case.
You will need the following:
-Motherboard with a compatible processor
-CPU Cooler
-Graphics Card
-Memory Cards (recommend no less than 8GB for games these days)
-Power Supply (recommend 750watts, and no worse than a Gold rating) - trust me....
-2 additional fans (unless your CPU Cooler has a radiator with fans)
-Operating System (software) i.e. Windows
If you are newer to building a PC, I recommend using PCPartPicker for compatibilities but don't believe all of their prices. I will also recommend using gpu.userbenchmarks.com for figuring out comparisons of graphics cards.