Powerline adapters are not usually a good solution for gaming. Some people can get away with it, but most houses (at least here in the uk ) don't have good enough or new enough wiring to sustain a constant low latency connection. Plus by the time you put fridges and freezers on there... and anything else. They are ok for general browsing and copying files about the place.
Wireless is usually a better option with a good adapter, or switch to Ethernet cable ideally as already suggested.
I have some pretty good powerline adapters and I ended up just switching back to wireless for gaming. It was just unreliable.
And the wiring in my house isnt even all that bad.