Nope you can't get an internet service running on the STB by connecting it to ethernet. The ethernet port is an outlet only that enables the STB to provide the functions of a modem. But, especially in the case of the PACE boxes, that functionality was very limited in speed.
There is a limited internet service on the STB, but that comes from the co-axial cable that brings in your TV services. I know my are had a basic email function. But it was all so pants that broadband on computer vastly superceeds it.
As for games and stuff like that - go and buy yourself an X-box
