Should I update my windows 8 to 8.1?

I have a Lenovo laptop, OS Windows 8, RAM 4GB, and graphics card AMD Radeon HD 8570 2GM, and Intel HD Graphics Card.

Should I update it to Windows 8.1? I have a lot of games installed on my pc, will they work then?
Added (1). AMD Radeon HD 8570 2GB, and Intel HD Graphics 4600.

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