When you are done running Port Finder it will show you the exact ports. If you want to know for sure whether or not Earthblade opens any ports for incoming data you can run our Port Finder application to see exactly what is happening. However it is possible that some single player games might need a port forwarded for things like: updates, downloading new content, and license activation. Generally speaking only multiplayer games need a port forwarded.
Since Earthblade is a single player game there should not be any need to forward ports for it. The storyline is the driving part of an adventure game.