|Just to add to what wanderer said, a port forward for gaming would only be necessary if you're running a game server behind a firewall.|
If you're running the client software connecting to a remote server, a port forward wouldn't even come into play, even if you configured one.
A port forward just tells the firewall to listen for connections on a specific port and if/when it gets one, to send that traffic to a particular internal address (computer). So what happens is, it takes a remote connection to trigger a port forward. In the case of you running a game and connecting to a remote game server, your firewall never gets hit with a connection request on that port so the forward doesn't activate.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.