I think the word "adequate" ( http://wordnet.princeton.edu/perl/webwn?s=adequate ) is more appropriate then Mediocre/"Average"(which sounds more negative than average).
VGPRO has the system mentioned on the show " Buy it, rent it, trash it"
example: http://www.vgpro.com/games/pc/hello_kitty_cutie_world
Right hand side, So its a pretty decent system..