what do you need to run unreal engine 4?
['Desktop PC or Mac.', 'Windows 7 64-bit or Mac OS X 10.9. 2 or later.', 'Quad-core Intel or AMD processor, 2.5 GHz or faster.', 'NVIDIA GeForce 470 GTX or AMD Radeon 6870 HD series card or higher.', '8 GB RAM.']