If you can, wired internet (or plug in cord if you want to say) is always the best choice not just playing games, even when just doing simple things like web browsing, facebook, etc. Wireless is designed for mobility, mostly if you want to browse the web with your smartphone or tablet... if you want to play games wireless, lets say you have a two floor house, and modem is upper floor, and you want to play games with your laptop on the lower floor, that's when wireless is useful. But though, as others said, wireless is prone with interference, as wireless signals can be blocked with physical things such as walls, metals, even glass. So your best bet, wire gaming (or plug in cord).